Question

Resolva as equações:
a) ×/5=21/35

b)10/7=50/×

c)1/7=×-6/49

d)5×+3/10=-21/30

e5/×+4/=30/54

f)0,9/×= - 18/27

me ajudem por favor !!!!

obs: tem que ser todas com cálculo !!

Answer 1

a) 35x=21.5
X= 21.5/35
X= 3

b) 10x=50.7
x= 35/10
x= 3,5

c)7(x-6)=49
7x-42=49
7x=49+42
x= 91/7
x=13

d) 30(5x+3)= -210
150x+90= -210
150x= -210-90
x= -300/150
x= -2

e)30(x+4)=5.54
30x+120=270
30x=270-120
x=150/30
x=5

f)-18x= 0,9.27
x=24,3/ -18
x= -1,35

Answer 2

Fiz no caderno! Espero que ajude!