Question

a)(2×-3)- (5-×)=4×+10

b)y+3y-20+20y-50=4y+100+30

c)0,9 : 3+ 4b = 23,3 - 3- b

alguém me ajuda ??

Answer 1

A) 2x-3-5+x = 4x+10
2x+x-4x = 10+3+5
3x-4x = 18
-x = 18(-1)
x = -18

B) y+3-20+20y-50 = 4y+100+30
y+3y+20y-4y = 100+30+50+20
24y-4y = 200
20y = 200
y = 200/20
y = 10

C)0,9 : 3+4b = 23,3-3-b
4b+b = -0,9.3+23,3-3
5b = -2,7+23,3-3
5b = 23,3-5,7
5b = 17,6
b = 17,6/5
b = 3,52

Um abraço.