Question

resolva as equações de 1 grau:

A) 5x-3=-3x+7+6

B) 9-x+2=-5x+3+2x

C) 15+3(x+2)=-7x+2(x+1)

D) 7(x-2)=5(x-3)

Answer 1

a) 5x-3=-3x+7+6
5x+3x=7+6+3
8x=16
x=16/8
x=2

b) 9-x+2=-5x+3+2x
-x+5x-2x=3-9-2
2x=-8
x=-8/2
x=-4

c) 15+3(x+2)=-7x+2(x+1)
15+3x+6=-7x+2x+2
3x+7x-2x=2-6-15
10x-2x=2-21
8x=-19
x=-19/8

d) 7(x-2)=5(x-3)
7x-14=5x-15
7x-5x=-15+14
2x=-1
x=-1/2

Answer 2

A) 5x-3=-3x+7+6
<=>5x+3x=7+6+3
<=>8x=16
<=>x=16/8
<=>x=2

B) 9-x+2=-5x+3+2x
<=>-x+3x=3-2-9
<=>2x=-8
<=>x=-8/2
<=>x=-4


C) 15+3(x+2)=-7x+2(x+1)
<=>15+3x+6=-7x+2x+2
<=>15+6-2=-7x+2x-3x
<=>19=-8x(-1)
<=>8x=-19
<=>x=-19/8

D) 7(x-2)=5(x-3)
<=>7x-14=5x-15
<=>7x-5x=-15+14
<=>2x=-1
<=>x=-1/2

espero ter ajudado.