Question

Calcule as expressões abaixo:
a) -x(-4)+50+(-45)+6x=37
b) 7(-3)+12-2(-2x)=27
c) 2x-4x-(+25)=75

Answer 1

4x+50-45+6x=37
10x=37-5
10x=32
x=32/10=3,2

b)-21+12+4x=27
-9+4x=27
4x=27+9
4x=36
x=36/4= 9

c) -2x-25=75
-2x= 100
x=-50