7x = 18 - 2x
7x + 2x = 18
9x = 18
x = 2
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9x+6 = 7x+18 9x-7x = 18-6 2x = 12 x = 6
This is only true if x = -31.
7x - 2x = 80 subtracting like terms, 5x = 80 divide both sides by 5 x = 16
It is 9x
It is an equation and the value of x is 2