Question

118) Tìm số nguyên x,biết

a) 2x - 35 = 15

b) 3x + 17 = 2

c) I x-1 I = 0

giúp mk với 4h mk học rồi

Answer 1

\(2x-35=15\)

\(\Rightarrow2x=15+35\)

\(\Rightarrow2x=50\)

\(\Rightarrow x=\frac{50}{2}=25\)

Vậy : \(x=25\)

\(3x+17=2\)

\(\Rightarrow3x=2-17\)

\(\Rightarrow3x=-15\)

\(\Rightarrow x=-\frac{15}{3}=-5\)

Vậy: \(x=-5\)

\(\left|x-1\right|=0\)

\(\Rightarrow x-1=0\)

\(\Rightarrow x=0+1=1\)

Answer 2

a)2x-35=15

2x =15+35

2x =50

x =50:2

x =25

b)3x +17=2

3x =17-2

3x =15

x =15:3

x =5

c)