7x + 5 = 3x - 15

solve for x

7x+5=3x-15 x=-5

Step-by-step explanation:

Subtract from both sides

7x+5-5=3x-15-5

{Simplify}

7x=3x-20

{Subtract}{3x from both sides}

7x-3x=3x-20-3x

{Simplify}

4x=-20

Divide both sides by 4

4x over 4 = - 20 over 4

{Simplify}

x=-5

7x + 5 = 3x - 15

4x = - 20

x = - 5