Question

Calcule o valor de x nas equações abaixo:
A)x+2=7
B)3x-1+3=11
C)7x+1+4=19
D)3x+x-1+2=17
E)6x-2x+3=11
F)7x+1=22
G)5x-1+2=16

Answer 1

A)x+2=7
x=7-2
x=5

B)3x-1+3=11
3x=11-3+1
3x=9
x=9/3
x=3

C)7x+1+4=19
7x=19-4-1
7x=14
x=14/7
x=2

D)3x+x-1+2=17
3x+x=17-2+1
4x=16
x=16/4
x=4

E)6x-2x+3=11
6x-2x=11-3
4x=8
x=8/4
x=2

F)7x+1=22
7x=22-1
7x=21
x=21/7
x=3

G)5x-1+2=16
5x=16-2+1
5x=15
x=15/5
x=3

Answer 2

A) x=7-2 x=5
B)3x-1+3=11  3x=11+1-3 3x=9  x=9/3 x=3
C)7x+1+4=19  7x=19-1-4  7x=14  x=14/7  x=7
D)3x+x-1+2=17 4x=17+1-2 4x=16 x=16/4 x=4
E)6x-2x+3=11 4x=11-3 4x=8  x=8/4 x=2
F)7x+1=22 7x=22-1 7x=21 x=21/7 x=3
G)5x-1+2=16  5x=16+1-2 5x=15 x=15/5 x= 3