Aplique a distributiva e resolva.
a) 4.(x-1)= 12
b) 5(3-x)-4x= 18
c) 9x-3.(2x+2)= 15
d) -3.(x-5)-2.(2x+1)= -8
Soluções para a tarefa
Respondido por
1
a) 4.(x-1)=12
4x-4=12
4x=12+4
4x=16
x=16/4
x=4
b) 5(3-x)-4x=18
15-5x-4x=18
-9x=18-15
-9x=3 (-1)
9x=-3
x=-3/9
c) 9x-3.(2x+2)=15
9x-6x-6=15
3x=15+6
3x=21
x=21/3
x=7
d)-3(x-5)-2(2x+1)=-8
-3x+15-4x-2=-8
-7x=-8-15
-7x=-23 (-1)
7x=23
x=23/7
4x-4=12
4x=12+4
4x=16
x=16/4
x=4
b) 5(3-x)-4x=18
15-5x-4x=18
-9x=18-15
-9x=3 (-1)
9x=-3
x=-3/9
c) 9x-3.(2x+2)=15
9x-6x-6=15
3x=15+6
3x=21
x=21/3
x=7
d)-3(x-5)-2(2x+1)=-8
-3x+15-4x-2=-8
-7x=-8-15
-7x=-23 (-1)
7x=23
x=23/7
Respondido por
1
a) 4x-4=12
4x=12+4==> 4x=16==>x=16/4==> x=4
b)15-5x-4x=18
15-9x=18
-9x=18-15
4x=12+4==> 4x=16==>x=16/4==> x=4
b)15-5x-4x=18
15-9x=18
-9x=18-15
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