Question

Resolva as equações aplicando as propriedades estudadas a)y+9=3 b)x-12=15 c)y+5=-4 d)3x=-12 e)3x=10 f)5x=90

Answer 1

a)

y + 9 = 3
y = 3 - 9
y = -6

b)

x - 12 = 15
x = 15 + 12
x = 27

c)

y + 5 = -4
y = -4 - 5
y = -9

d)

3x = -12
x = -12/3
x = -4

e)

3x = 10
x = 10/3

f)

5x = 90
x = 90/5
x = 18

Answer 2

a)y+9=3
y=3-9
y=-6

b)x-12=15
x=15+12
x=27

c)y+5=-4
y=-4-5
y=-9

d)3x=-12
x=-12/3
x=-4

e)3x=10
x=10/3
x=3.33

f)5x=90
x=90/5
x=18