Question

Qual a resposta de:



1+3x=16



X+1=9



-x-2=8


2x+3=13




7x+1=13




2x-4=3

Answer 1

1+3x=16
3x= -1 + 16
3x =15
x=5

X+1=9
x= -1 + 9
x=8

-x-2=8
-x + 2+ 8
x= -10

2x+3=13
2x= -3 + 13
2x= 10
x=5

7x+1=13
7x= -1 + 13
7x= 14
x= 2

2x-4=3
2x= 4+ 3
2x= 7
x= 3,5