Question

observe o exemplo e resolva a equação

5 (x -1) =30
.
.
.
.
.
2 ) x - 10 - 7 = 16
.
.
.
.
.
7 ( X -2 ) = 5 ( x + 3)=



me ajudem

Answer 1

5 ( x - 1 ) = 30

5x - 5 = 30

5x = 30 + 5

5x = 35

x = 35/5

x = 7 <-------
_________________________________________
x - 10 - 7 = 16

x - 17 = 16

x = 16 + 17

x = 33 <-------
________________________________________
7 ( x - 2 ) = 5 ( x + 3 ) =

7x - 14 = 5x + 15

7x - 5x = 15 + 14

2x = 29

x = 29/2 <------


Forte abraço!