How do you solve equations that contain addition or subtraction?

Answers

Answer 1

Answer: Any equation given, with a variable, could be solved by applying the inverse operation.

Example:-

4 + x = 8
-4 -4

x = 8 -4
x = 4

Answer; x = 4

Answer 2

Answer: To learn the basics I would suggest using this simple model to solve. Remember, that you can add, subtract, multiply, or divide anything to both side of the equal sign.
Ex. 5 + 5 = x
-5 -5

Now, let's try a real problem:

10 + x = 15
Now, I know this may seem to be an easy problem, but by using the method I am about to show you, you will be able to solve any addition, subtraction, even multiplication, and division equation!
This would be how you solve:
10 + x = 15
-10 -10
----------------------------------------
x = 5

Hope this helped!

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four families went out to dinner the total bull came our to $327 the families also left a $50 tip for the waiter if each family spent the same amount about how much did each family spend on dinner

Answers

all together they spent 708 dollars on dinner

Lily buys a sweater that is on sale for $42, which is 75% of the original price of the sweater. What was the original price of the sweater?

Answers

We have an equation: 42/? = 75/100

Cross multiply:
75*? = 42*100
⇒ ? = 42*100/75= 56

The original price of the sweater was $56.

Hope this helps~

42 dollars is 75% so 25% is 14 and 100% is 56

a chef uses 1 cup of cheese per 2 cups of milk im a casserole. how nany cups of cheese are needed if the chef uses 6 cups of milk

Answers

Answer:

3 cups

Step-by-step explanation:

6/2=3*1=3

Answer:

3 cups of milk

Step-by-step explanation:

answer is 3cup

Write an equation that involves multiplication, contains a variable, and has a solution of 5. Then write another equation that has the same solution and includes the same variable and numbers but use divison.

Answers

so the solution is 5 we'll start with that
x=5

to do reverse multiplcation, you must divide so
x=5
x/10=5/10
x/10=1/2

then the other problem
x=5
5x=25

to solvve

x/10=1/2
multiply by 10
x=5

then
5x=25
divide both sides by 5
x=5

B×3=53÷b=5I beleive that these would work for the standards you have set.

Which of the following is equivalent to 1 cup

Answers

1 cup=16 tablespoons

16 tablespoons :::)))

What is 72 % of 350 friends

Answers

'is' in mathematics means equal
'of' in mathematics means multiplication

72% can also be written as 72/100

We are solving for the variable 'x'

$x = (72)/(100) * 350\n\nx = 72 * 3.5\n\n\boxed{\bf{x = 252}}$

350 friends* (72/100)= 252 friends.

Final answer: 252 friends~

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