7x + 9 = x + 3 First Subtract x from both sides
7x - x + 9 = 3 So 7x - x = 6x
6x + 9 = 3 Next Subtract 9 from both sides
6x = 3 - 9 3 - 9 = -6 Then divde by 6 on both sides
x = -1 -6 divided by 6 = -1
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x=(-9/7) 7x+12=3 7x=(-9) x=(-9/7)
x = -1/3
-7x + 5 = -9 -7x = -14 7x = 14 x = 2
If: x+3+6x+9 = 0 then 7x+12 = 0 So: 7x = -12 and x = -12/7
7x - 2 = 4x + 9 3x - 2 = 9 3x = 11 x = 11/3