Question

1.- Despeja el valor de la incógnita,
3(x+4)= -5x - 36, 5(r + 6) = -5(r - 4),
9(z-6) = 4(z+4)​

Answer 1

3(x + 4) = -5x - 36

3x + 12 = -5x - 36

3x = -5x - 36 - 12

3x = -5x - 48

3x + 5x = -48

8x = -48

x = -48/8

x = -6

5(r + 6) = -5(r - 4)

5r + 30 = -5r + 20

5r = -5r + 20 - 30

5r = -5r - 10

5r + 5r = -10

10r = -10

r = -10/10

r = -1

9(z - 6) = 4(z + 4)​

9z - 54 = 4z + 16

9z = 4z + 16 + 54

9z = 4z + 70

9z - 4z = 70

5z = 70

z = 70/5

z = 14