Question

a)2 x + 1 = 4x - 7 b)9 x +9+3x = 15 c)4 x - 7 = 8 x - 2 d)4 x -10 = 2x + 2 como resolvo essas equações?

Answer 1

a) 2x+1=4x-7
2x-4x=-7-1
-2x=-8
x=4

b)9x+9+3x=15
12x+9=15
12x=15-9
12x=6
x=1/2

c)4x-7=8x-2
4x-8x=-2+7
-4x=5
x=-5/4

d)4x-10=2x+2
4x-2x=2+10
2x=12
x=6