Question

calcule o valor de X de modo que :
a) 2x +3 = 15
b) 7x -1 = 13
c) 2x -4 = 3
d) 4x +2 = -18
e) 5x -2 = 7 + 6
f ) 10x +1 = -4 -5
AJUDAA

Answer 1

Boa tarde

a) 2x+3=15
2x=15-3
2x=12
x=12/2
x=6

b) 7x-1=13
7x=13+1
7x=14
x=14/7
x=2

c) 2x-4=3
2x=3+4
2x=7
x=7/2
x=3,5

d) 4x+12=-18
4x=-18-12
4x=-30
x=-30/4
x=-7,5

e) 5x-2=7+6
5x=7+6+2
5x=15
x=15/5
x=3

f) 10x+1=-4-5
10x=-4-5-1
10x=-10
x=-10/10
x=-1

Espero ter ajudado!