Question

calcule o valor de x de modo que:
a) 2×+3=15
b) 7×1=13
c) 2×-4=3
d) 4×+2=-18

Answer 1

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

b)7x1=13
qual o sinal de um por favor.

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

d)4x+2=-18
4x=-18-2
4x=-20
x=-20/2
x=-5

Answer 2

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+2=-18
4x=-18-2
4x=-20
X=-20/4
X=-5