Respostas
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A) x+5=8
X=8-5
X=3
B)x-4=3
X=3+4
X=7
C)x+6=5
X=5-6
X=-1
D)x-7=-7
X=-7+7
X=0
E)9x-2=4x+18
9x-4x=18+2
5x=20
X=20/5
X=4
F)2x-10+7x+10=180
9x=180
X=180/9
X=20
G)7y-10=y+50
7y-y=50+10
6y=60
Y=60/6
Y=10
H)4x-18+3x=10
7x=10+18
7x=28
X=28/7
X=4
i)2x+5+x+7=18
3x=18-5-7
3x=6
X=6/3
X=2
J)5x-91=4x-77
5x-4x=-77+91
X=14
K)7x+1=5x-7
7x-5x=-7-1
2x=-8
X=-8/2
X=-4
L)4x+5=x+20
4x-x=20-5
3x=15
X=15/3
X=5
X=8-5
X=3
B)x-4=3
X=3+4
X=7
C)x+6=5
X=5-6
X=-1
D)x-7=-7
X=-7+7
X=0
E)9x-2=4x+18
9x-4x=18+2
5x=20
X=20/5
X=4
F)2x-10+7x+10=180
9x=180
X=180/9
X=20
G)7y-10=y+50
7y-y=50+10
6y=60
Y=60/6
Y=10
H)4x-18+3x=10
7x=10+18
7x=28
X=28/7
X=4
i)2x+5+x+7=18
3x=18-5-7
3x=6
X=6/3
X=2
J)5x-91=4x-77
5x-4x=-77+91
X=14
K)7x+1=5x-7
7x-5x=-7-1
2x=-8
X=-8/2
X=-4
L)4x+5=x+20
4x-x=20-5
3x=15
X=15/3
X=5
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