MATHEMATICS MIDDLE SCHOOL

(4 marks)5. Solve the following equations:
a) x+5 = 7
b) 2x - 8 = 20
c) 4x - 6x = 200
d) x+1= 5
3

Answers

Answer 1
Answer:

a) x + 5 = 7

x + 5 - 5 = 7 - 5 (Subtract 5 from both sides)

x = 2

b) 2x - 8 = 20

2x - 8 + 8 = 20 + 8 (Add 8 to each side)

2x = 28

2x/2 = 28/2 (Divide each side by 2)

x = 14

c) 4x - 6x = 200

-2x = 200

-2x/-2 = 200/-2 (Divide each side by -2)

x = -100 (Note that a negative number divided by a negative number is positive, whereas a positive number divided by a negative number is negative)

d) x + 1 = 5

x + 1 - 1 = 5 - 1 (Subtract 1 from each side)

x = 4
Answer 2
Answer: I think:
A) x=7-5
X= 2

B) 2x=20+8
2x= 28
X= 28/2
X= 14


C) -2x= 200
X= 200/-2
C= -100

D) x=5-1
X=4

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Answers

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Step-by-step explanation:

Given : A car travels at 65 miles per hour. Going through construction, it travels at 3/5 this speed.

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A car salesperson sells a used car for ​$ and earns ​% of the sale price as commission. How many dollars does the salesperson earn in​ commission?

Answers

You haven't provided the $ or % that he gets, but I will attempt to use algebraic terms to explain it instead.

If the salesman sells a car for $a and gets b% of the sale price as commission, then what you need to do is divide the a by 100, then multiply it by b to find out b% of a. This will be the commission that he will earn.

a / 100 x b = commission earned in $

Edit

You've now supplied me with the $ and %, let me explain it again.

To find out the commission that he will earn, you divide 8,100 by 100 then multiply it by 9.

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Answer:

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that the answer for mine

if its 7,500  and earns 9%
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