x=-7
11
x = 5
9x-5x=4x, 7/4=1.75, x=1.75
4x+7=9x+7 -5x=0 x=0
No because they don't have the same slope (9x & 3x)
9x + 7 = 15x + 1 ___-1_______-1 9x + 6 = 15x -9x_____-9x ____6=6x ____/6_/6 ____1=x x equals 1.
If: 9x+7 = 6x+25 Then: x = 6
9x+4 =x-7 8x=-3 x=-3/8
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x=7