solve for x in: 3x+7=x+3?

3x + 7 = x + 3
2x + 7 = 3 <--- subtract x from both sides
2x = -4 <--- subtract 7 from both sides

x = -2

3x + 7 = x + 3
3x - x = -7 + 3
2x = -4
x = -4/2
x = -2

2x = - 4
x = - 2

3x + 7 = x + 3
3x - x + 7 = 3 (substract s from both sides)
2x + 7 -7 = 3 -7 (substract 7 from both sides)
2x = -4

x = -4/2 (divide both side by 2)

therfore x = -2

;-)

-2

3x - x = 3 - 7
2x = -4
x = -2

3x + 7 = x + 3

3x - x = -7 + 3

2x = -4

x = -4/2

x = -2

3x + 7 = x + 3 (subtract x from both sides)
2x + 7 = 3 (subtract 7 from both sides)
2x = -4 (divide both sides by 2)
x = -2 <=== answer!