Question

 

Tim y:

a)219-7(y+1)=100

b)(3y-6).3=3^4

c)(4600+6400)-7y=3839

d)[(8y-14):2-2]-31=341

TRen 11 kb vs mk nha

Answer 1

a) 219 - 7(y + 1) = 100

=> 7(y + 1) = 119

=> y + 1 = 19

=> y = 18

vậy_

Answer 2

a) 219 - 7(y+1) = 100

7(y+1) = 119

y+1 = 17

y = 16

các bài cn lại lm tương tự nha!

Answer 3

a, 219-7(y+1)=100

7(y+1)=219-100

7(y+1)=119

y+1=119:7

y+1=17

y=17-1

y=16