Question

determine o valor da incógnita x:

a)2x-8=10

b)3-7( 1 -2x )= 5-(x+9)=

Answer 1

A)2x-8=10
2x= 10+8
2x=18/2
X=9
B)3-7(1-2x)=5-(x+9)
3-7+1-2x=5-x+9
-2x +x=5+9-1+7-3
-x= 17 .(-1)
X= -17

Answer 2

a) 2x=10+8
2x=18
x=18/2
x=9

b)3-7+14x=5-x-9
-4+14x=-4-x
15x = +4-4
15x=0
x=0