5x+7=3x21
7= 7
5x=3x14
3x=3x
2x=14
2x/2x=2x/14
x=7
The Answer Is 7

10x+7 = 5x+32 10x5x = 327 5x = 25 x = 5
If: 10x+7 = 5x+22 Then: 10x5x = 227 And: 5x = 15 So: x = 3
DIE
5x + 7 = 4subtract 7 from both sides5x = 3divide both sides by 5x = 3/5
3x  7 = 5x + 133x  5x = 13 + 72x = 20x = 10x=3
If: 5x = 4x+7 Then: 5x4x = 7 And: x = 7
8x7 plus 2x equals 6 plus 5x plus 2?
10x+7 = 5x+32 10x5x = 327 5x = 25 x = 5
If: 10x+7 = 5x+22 Then: 10x5x = 227 And: 5x = 15 So: x = 3
DIE
6x+3 = 75x 7+3 = 6x5x 10=x
3x + 2 + 2x = 7; 3x + 2x = 5x, so 5x + 2 = 7; 72=5, so 5x=5. 5x divided by 5 and 5 divided by 5 equals 1, so x equals 1.
It is: y = 1/5x+7 that is perpendicular to y = 5x+7
5x + 7 = 4subtract 7 from both sides5x = 3divide both sides by 5x = 3/5
3x  7 = 5x + 133x  5x = 13 + 72x = 20x = 10x=3
If: x = 7 Then: y = (2*7)+3 = 17 And: 5x+y = (5*7)+17 = 52
7