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x+2x-y-2+32 = 3x-y+32
2a+6b+5a+3b-2 = 7a+9b-2
b. x + 2y -2 + (2x-y +32) = x +2x + 2y -y -2+32= 3x + y +30
c. 4-2(a + 3b) + (5a + 3b -2) = 4 - 2a -6b + (5a + 3b -2) = 3a - 3b +2