Question

resolva as equações a seguir:
a) -7x+5x=60
b)8x+12=5x-48
c)7x-23+2x=6x-6
d)2(4x+3)=5(x-3)

Answer 1

a) -7x+5x=60
-7x+5x = -2x
-2x=60
x= -60/2
x= -30
b)8x+12=5x-48
8x-5x=48-12
3x=36
x=36/3
x=12
c)7x-23+2x=6x-6
7x+2x-6x=-6+23
3x=17
x=17/3
x=5,6..
d)2(4x+3)=5(x-3)
8x+6=5x-15
8x-5x=-15-6
3x=-21
x=-21/3
x= -7

Answer 2

a) -2x=60
x=60/-2
x=-30

b) 8x-5x=-48-12
3x=-60
x=-60/3
x=-20

c) 9x-23=6x-6
9x-6x=-6+23
3x=17
x=17/3

d) 8x+6=6x-15
8x-5x=-15-6
3x=-21
x=-21/3
x=-7