Question

Resolva as equações:

a) 3(x - 1 ) - (2x - 4) = 1
b) 7 (x-1) - 2 ( x - 5) = x - 5
c) 2 (3x - 5) - x= 10 - 3x
me ajudem pvff

Answer 1

a) 3X - 3 - 2X + 4 = X + 1

b) 7X - 7 - 2X + 4 = X - 5
7X - 2X- X = - 5 - 4 + 7
4X = - 8
X = - 2
c) 6X - 10 - X = 10 - 3X
6X + 3X - X = 10 + 10
9X = 20
X = 20/9

Answer 2

a)

3(x-1)- (2x-4)=1

3x-3-2x+4=1

3x-2x=1+3-4

x=0

b)

7(x-1)-2(x-5)=x-5

7x-7-2x+10=x-5

7x-2x-x=-5+7-10

4x=-8

x=-8/4

x=-2

c)

2(3x-5)-x=10-3x

6x-10-x=10-3x

6x-x+3x=10+10

8x=20

x=20/8

x=2,5