Question

Podem me ajuda a resolver essas 3 equações. fico agradecido

a) 3(x-14)=7(x-18)

b) 9x-3-4x=8x-7+x

c) 6(5x-2)-5(6x-5)=4(9-2x)+1

Answer 1

a) 3.(x-14)=7.(x-18)
3x-42=7x-126
3x-7x=-126+42
-4x=-84.(-1)
4x=84
x=84/4
x=21
b) 9x-3-4x=8x-7+x
9x-4x-8x-x=-7+3
9x-13x=-4
-4x=-4.(-1)
4x=4
x=4/4
x=1

Answer 2

a)
3(x - 14) = 7(x - 18)
3x - 42 = 7x - 126
- 42 + 126 = 7x - 3x
84 = 4x
4x = 84
x = 84/4
x = 21
============================
b)
9x - 3 - 4x = 8x - 7 + x
9x - 4x - 3 = 8x + x - 7
5x - 3 = 9x - 7
- 3 + 7 = 9x - 5x
4 = 4x
4x = 4
x = 4/4
x = 1
=========================
c)
6.(5x - 2) - 5.(6x - 5) = 4(9 - 2x) + 1
30x - 12 - 30x + 25 = 36 - 8x + 1
13 = - 8x + 37
8x = 37 - 13
8x = 24
x = 24/8
x = 3