Question

5(3x-x)-7(x+3)=8(3-x)

Answer 1

\(5\cdot\left(3x-x\right)-7\cdot\left(x+3\right)=8\cdot\left(3-x\right)\)

= \(5.2x-7x-21=24-8x\)

= \(10x-7x+8x=24+21\)

= \(11x=45\)

-> \(x=\frac{45}{11}\)

Answer 2

5(3x-x)-7(x+3)=8(3-x)

<=>5.2x-7x-21=24-8x

<=>10x-7x-21=24-8x

<=>3x-21=24-8x

<=>3x+8x=24+21

<=>11x=45

mà 45 không chia hết cho 11 nên x thuộc rỗng

Answer 3

5(3x-x)-7(x+3)=8(3-x) <=> 5.2x-7x-21=24-8x <=> 10x-7x+8x=21+24 <=> 11x=45 <=> x=45/11 Vậy x=45/11