Question

1 ) Tìm x biết :
(30x + 60) - ( 6x - 30 ) - 24x = 100
Tick <=>

Answer 1

\(\left(30x+60\right)-\left(6x-30\right)-24x=100\)

\(\Leftrightarrow30x+60-6x+30-24x=100\)

\(\Leftrightarrow30x-6x-24x+\left(60+30\right)=100\)

\(\Leftrightarrow0x=100-\left(60+30\right)\)

\(\Leftrightarrow0x=10\)

\(\Rightarrow x\in\varnothing\)

Answer 2

1) Tìm x biết :

(30x +60)-(6x-30)-24x=100

<->30x +60 -6x +30 -24x =100

<-> x + 90 =100

<-> x=100-90

<-> x=10