Question

Preciso do resultado das equações e delas feitas (por favor) :

A) 5x-20=80+9x

B) 70-2x=10+4x

C) 5x-10=20+3x

D) 4x-80=100+5x

Answer 1

a) 9x+80=5x-20
9x-5x=-80-20
4x=-100
x=-100
4
x=-25

b)4x+10=70-2x
4x+2x=70-10
6x=60
x=60
6
x=10

c)5x-10=20+3x
5x-3x=20+20
2x=40
x=20

d)5x+100=4x-80
5x-4x=-100-80
1x= -180

Answer 2

A)5x-20=80+9x
5x-9x=80+20
-4x=100 (-1)
x=100/4
x=25

B)70-2x=10+4x
-2x-4x=10-70
6x=-60 (-1)
x=60/6
X=10

C)5x-10=20+3x
5x+3x=20+10
8x=30
X=30/8
X=3,75

D)4x-80=100+5x
4x-5x=100+80
-x=180 (-1)
x=180



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