Question

7x+15=3x-5 and i want help

Answer 1

simplify first:
7x-3x=-5-15
then do the solve the equation:
4x= -20
then just divide:
4x/4=-20/4
answer:
x=(-5) … it is negative because the 20 was negative

Answer 2

x = -5

Explanation:

7x + 15 = 3x - 5

We want all x's on the left side and all numbers (with no x) on the right side.

Step 1. Since we see 3x on the right side, subtract 3x from both sides.

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

4x + 15 = -5

Now subtract 15 from both sides.

4x + 15 - 15 = -5 - 15

4x = -20

Since x is being multiplied by 4, divide both sides by 4.

4x/4 = -20/4

x = -5

Answer: x = -5