2x+2=161-4x
6x+2=161
6x=159
x=26.5
See that? Add 4x to the other side, Subtract 2 from the other side, divide 159 by 6.
Done.
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2x+a=p 2x=p-a x=.5p-.5a
many solutions
2x + 2x + 146 + 26 = 172 4x + 172 = 172 4x = 0 x = 0
2x+3 = 7 2x = 7-3 2x = 4 x = 2
(2x)ysquared