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
A) 5x-20=80+9x
B) 70-2x=10+4x
C) 5x-10=20+3x
D) 4x-80=100+5x
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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
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
x