Question

8x+15=3x-20 please explain how to solve this

Answer 1

You said                                    8x + 15  =  3x - 20

Subtract  3x  from each side:    5x + 15  =      - 20

Subtract  15  from each side:    5x          =     - 35

Divide each side by  5 :               x         =     -  7
 

Answer 2

8x + 15 = 3x - 20

First, take away '3x' from both sides.
$8x + 15 - 3x = -20$
Second, subtract '8x - 3x' to get '5x'.
$5x + 15 = -20$
Third, take away '15' from both sides.
$5x = -20 - 15$
Fourth, add '-20 - 15' to get '-35'.
$5x = -35$
Fifth, divide both sides by '5'.
$x = \frac{35}{5}$
Sixth, how many times does 5 go into 35? 35 ÷ 5 = 7.
$x = -7$

Answer: x = -7
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