Question

Revisão das equações 1ºgrau m.m.c. com frações

1. x+2+5=23

2. 2(x+2)-10=50

3. 50+4x+10=-x+20

4. 35+4x+2x=100+5x

Answer 1

Resposta:

Explicação passo a passo:

1.

x+2+5=23

x+7=23

"x= 23-7"

"x=16"

_____________

2.

2(x+2)-10=50"

2x+4-10=50

2x-6=50"

"2x=50 +6"

"2x= 56"

"x= 56/2"

"x =28"

____________

3.

50+4x+10=-x+20

"60+4x= -x+20"

"4x+ x =20-60"

"5x= -40"

"x= - 40/5"

"x= - 8"

_______________

4.

35+4x+2x=100+5x

35+6x=100+5x

"6x-5x = 100-35"

"x = 65"

__________________

Answer 2

1-
X+2+5=23
X+7=23
"X= 23-7"
"X=16"

2-
2(x+2)-10=50"
2x+4-10=50
2x-6=50"
"2x=50 +6"
"2x= 56"
"×= 56/2"
"x=28"

3-
50+4x+10=-×+20
"60+4x=-×+20"
"4x+ x =20-60"
"5×=-40"
"x= - 40/5"
"x= - 8"

4-
35+4×+2x=100+5x
35+6×=100+5x
"6x-5x = 100-35"
"x = 65"