45+4 = 49 49/7=7 7*7=49-4=45 so x=7
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7x + y = 4y = 4 - 7x
-7x + 6 + 7x - 2 = 4
6 = 7x + x First, add 7x and x.6 = 8xNow, divide both sides by 8.6/8 = xSimplify the answer.3/4 = x.
7x-4=9x+10-14=2xx=-7
9x-4 = 7x+8 9x-7x = 8+4 2x = 12 x = 6