Question

Calcular:
a) x+30=40
b)30-20+2x=10
c)3x-10+13=-2x+28
d)20x-30=40+30-20
e)-5x+45-89=-90+41
f)10x-20=40+50
g)20-80+2x=10

se conseguirem responder agradeço ^^​

Answer 1

Resposta:

a) 10

b) 0

c) 25

d) 80

e) 36,6

f) 11

g) 35

Explicação passo-a-passo:

a) x+30=40

X = 40 - 30

X = 10

b)30-20+2x=10

2X = 10 + 20 - 30

2X = 0

X = 0/2 = 0

c)3x-10+13=-2x+28

3X - 2X = 28 + 10 - 13

X = 25

d)20x-30=40+30-20

20X = 40 + 30 + 30 - 20

20X = 80

X = 80/20 = 40

e)-5x+45-89=-90+41

(-5X) = (-90) - 45 + 41 - 89

(-5X) = - 183

X = -183/(-5) = 36,3

f)10x-20=40+50

10X = 40 + 50 + 20

10X = 110

X = 110/10 = 11

g)20-80+2x=10

2X = 10 - 20 +80

2X = 70

X = 70/2 = 35