Question

Resolva as equações:
a) 5(2x+7)-1=4(x-5)+9 ,
b) 2(x-1)+3(x+1)=4(x+2) ,
c) 2(x+1)+5(x-1)=7 ,
d) 2(2x+3)+5(x+1)=8-3(x-1)

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Answer 1

a) 5(2x+7)-1=4(x-5)+9
10x+35-1=4x-20+9
10x-4x=-20+9+1-35
6x=-11-34
6x=-45
x=-45/6
x=-7,5
b) 2(x-1)+3(x+1)=4(x+2)
2x-2+3x+3=4x+8
2x+3x-4x=8-3+2
5x-4x=5+2
x=7
c) 2(x+1)+5(x-1)=7
2x+2+5x-5=7
2x+5x=7+5-2
7x=12-2
7x=10
x=10/7
d) 2(2x+3)+5(x+1)=8-3(x-1)
4x+6+5x+5=8-3x+3
4x+5x+3x=8+3-5-6
12x=11-11
12x=0
x=0/12
x=0