Question

132,5-2X=29,9 

18-5X=8

2X+14=26

X-105÷21=15

315+(125-X)=81

Giúp mk nja mk cần gấp lắm trong hôm nay nhé

 

 

Answer 1

a)  \(132,5-2x=29,9\)

<=>\(2x=132,5-29,9\)

<=>\(2x=102,6\)

<=>\(x=102,6:2\)

<=>\(x=51,3\)

b)   \(18-5x=8\)

<=>\(5x=18-8\)

<=>\(5x=10\)

<=>\(x=10:5\)

<=>\(x=2\)

c)   \(2x+14=26\)

<=>\(2x=26-14\)

<=>\(2x=12\)

<=>\(x=12:2\)

<=>\(x=6\)

d)   \(x-105:21=15\)

<=>\(x-5=15\)

<=>\(x=15+5\)

<=>\(x=20\)

e)   \(315+\left(125-x\right)=81\)

<=>\(125-x=81-315\)

<=>\(125-x=-234\)

<=>\(x=125--234\)

<=>\(x=125+234\)

<=>\(x=359\)

                   K CHO MINK NHA