Question

Expressões Algébricas

3 . (y + 3) + 5y = 25

2 . (x + 3) = 12

4 . (x + 2) = 10

6 . (x + 4) = 8

10. (x + 2) + 3x = 25

8 . (x + 1) + 2x = 14

12. (x + 2) + 4x = 36

2 . (y + 6) + 2y = 8

Answer 1

3 . (y + 3) + 5y = 25

3y + 9 + 5y = 25

8y + 9 = 25

8y = 25 - 9

8y = 16

y = 2

2 . (x + 3) = 12

X = 12 - 3

X = 9

4 . (x + 2) = 10

X = 10 - 2

X=8

6 . (x + 4) = 8

4 = 8 - 4

X = 4

10. (x + 2) + 3x = 25

10X + 20 + 3X = 25

13X + 20 = 25

13X = 25 - 20

13X = 25 - 20

13X = 5

X = 5/13

8 . (x + 1) + 2x = 14

8X + 8 + 2X = 14

10X + 8 = 14

10X = 14 - 8

10X = 6

X = 3/5

12. (x + 2) + 4x = 36

12X +24 + 4X = 36

16X + 24 = 36

16X = 32 - 24

16X = 12

X = 3/4

2 . (y + 6) + 2y = 8

2y + 12 + 2y = 8

4y + 12 = 8

4y = 8 - 12

4y = -4

y = -1