To find x
-2x = 20 divide both sides by negative 2
-2x/-2 = 20/ -2
x = -10
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2x-4 = 20 2x = 20+4 2x = 24 x = 12
10
-2x+14=20 x=-3
2x-6y = 20 -6y = -2x+20 y = 1/3x-20/6 The slope is 1/3
-2x+20 = 3x 20 = 3x+2x 20 = 5x 4 = x So x = 4