Question

sendo u = q resolva as equações
(A)3X - 9 = 9
(B)X - 5 = -7
(C)Y - 6 = 5Y + 8
(D)10X = 20 + 9X
(E)2X + 5 - X = 5 - 3X
(F)2M + 6 = M
(G) 2X + 1 = 15
(H) 5 - X - 20 = 5X - 10 - 7X
(I) X + 6 = 2 - 3X

Answer 1

a) 3x-9 = 9
3x = 9+9
3x = 18
x = 6

b) x-5 = -7
x = -7+5
x = -2

c) y-6 = 5y+8
y-5y = 8+6
-4y = 14.(-1)
4y = -14
y = 14/4

d) 10x = 20+9x
10x-9x = 20
x = 20

e) 2x+5-x = 5 -3x
2x-x+3x = 5-5
x = 0

f) 2m+6 = m
2m-m = 6
m = 6

g) 2x+1 = 15
2x = 15-1
2x = 14
x = 7

h) 5-x-20 = 5x-10-7x
-x-5x+7x = -10-5+20
x = 5

i) x+6 = 2-3x
x+3x = 2-6
4x = -4
x = -1