1)resolva as equações sendo U=Q:
A)4(x+10)- 2(x-5)=0 B)3(2x-1)=- 2(x-3) C)15+3(x+2)=- 7x+2(x+1) D)- 5(- x-4)=- 5
A)4(x+10)- 2(x-5)=0 B)3(2x-1)=- 2(x-3) C)15+3(x+2)=- 7x+2(x+1) D)- 5(- x-4)=- 5
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4x+40-2x+10=0
2x=-60
x=-30
B)3(2x-1)=- 2(x-3)
6x-3=-2x+6
8x=9
x=9/8
C)15+3(x+2)=- 7x+2(x+1)
15+3x+6=-7x+2x+2
-8x=-19
x=19/8
D)- 5(- x-4)=- 5
+5x+20=-5
5x=-25
x=-5