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Anonymous
2.333333......... or, 2 and 1/3
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3x+7=37 -7 -7 3x=30 /3 /3 x=10
(-3) x (-2z - 7) = 6z + 21 = 3 (2z + 7)
x/3 + 7 = 5 x/3 = -2 x = -6
3.
2x + 3 = x - 4 2x + 7 = x x + 7 = 0 x = -7 2(-7) + 3 = -11 (-7) - 4 + -11