Question

A)9x-2=4x+18
B)7y-10=y+50
C)2x-6+8×+4=5x+10
D)3x+6-1=2x+6-7
E)33+y=5-3y ​

Answer 1

Resposta:

a) 4 b) 10 c) 12 d) -6 e) -7

5

Explicação passo-a-passo:

a) 9x - 2 = 4x + 18

9x - 4x - 2 = 18

9x - 4x = 18+2

5x = 20

x = 20

5

x= 4

.

.

.

b) 7y - 10 = y + 50

7y - y - 10 = 50

7y - y = 50 + 10

6y = 50 + 10

6y = 60

y= 60

6

y = 10

.

.

.

c) 2x - 6 + 8x + 4 = 5x +10

10x - 6 + 4 = 5x + 10

10x - 5x = 10 + 2

5x = 10 + 2

5x = 12

x= 12

5

.

.

.

d) 3x + 6 - 1 = 2x + 6 - 7

3x - 1 = 2x - 7

3x - 2 -1 = -7

3x - 2x = -7 + 1

x= -7 + 1

x= -6

.

.

.

e) 33 + y = 5 - 3y

33 + y + 3y = 5

y + 3y = 5 - 33

4y = 5 - 33

4y = -28

y = -28

4

y = -7