5x÷8-3x=40 7x-8=42+3x 9x+7-3x=9x-3

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5x÷8-3x=40 7x-8=42+3x 9x+7-3x=9x-3
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5x÷8-3x=40 7x-8=42+3x 9x+7-3x=9x-3
5x÷8-3x=40 7x-8=42+3x 9x+7-3x=9x-3

5x÷8-3x=40 7x-8=42+3x 9x+7-3x=9x-3
5x÷8-3x=40
5x-24x=320
-19x=320
x=-320/19
7x-8=42+3x
7x-3x=42+8
4x=40
x=10
9x+7-3x=9x-3
9x-3x-9x=-3-7
-3x=-10
x=10/3