Question

b) x/4+x/3=7

c) x/2+x/5=7

d) x/5+x/3=8

e) x/2+x/6=4

f) x/8+x/6=7

URGENTE! HELP ;;-;;​

Answer 1

Vamos lá...

b)

x/4 + x/3 = 7 ⇒  mmc = 12

3x + 4x = 84

7x = 84

x = 84/7

x = 12

c)

x/2 + x/5 = 7   ⇒ mmc = 10

5x + 2x = 70

7x = 70

x = 70/7

x = 10

d)

x/5 + x/3 = 8⇒mmc = 15

3x + 5x = 120

8x = 120

x = 120/8

x = 15

e)

x/2 + x/6 = 4⇒mmc = 6

3x + x = 24

4x = 24

x = 24/4

x = 6

f)

x/8 + x/6 = 7 ⇒ mmc = 24

3x + 4x = 168

7x = 168

x = 168/7

x = 24

Bons estudos.