Question

resolva as equações
a) 4 (x+ 1) =12
b) 2x + x - 5 > 19 + 5x
c) 5x - 15 < 2x + 3 + 5 ​

Answer 1

A)

4(x+1)=12

4x+4=12

4x=12-4

4x=8

x=8/4

x=2

B)

2x+x-5>19+5x

2x+x-5x>19+5

-2x>24

x>24/-2

x>-12

C)

5x-15<2x+3+5

5x-2x<3+5+15

3x<23

x<23/3

x<7,66...