Question

Resuelve
a) 6(7-x)=8(6-x)

B) -8(10-x)=-6

c) (x+2).3=(13-x).4+3

d)3(1-2x)+12=10-2(x-3)

Answer 1

A) 6(7-x) = 8(6-x)
42-6x = 48 - 8x
8x-6x = 48 - 42
2x = 6
X= 6/2
X=3

B) - 8(10-x) = - 6
-80 +8 x = -6
8x = 80-6
X = 74/8 simplificando
X= 37/4

c) (x+2).3=(13-x).4+3
3x+6 = 52 - 4x +3
3x +4x = 55-6
7x= 49
X= 49/7
X = 7

d)3(1-2x)+12=10-2(x-3)
3-6x +12 = 10 - 2x +6
15 - 6x = 16-2x
15-16 = 6x-2x
-1 = 4x
X= - 1/4