Question

Answer 1

1: x+5=0

=>x=0-5=-5

2: 3x-5=0

=>3x=5

=>\(x=\dfrac{5}{3}\)

3: 3=x-2

=>x-2=3

=>x=3+2=5

4: 7=x+4

=>x+4=7

=>x=7-4=3

6: x-6=2x

=>x-2x=6

=>-x=6

=>x=-6

5: 2x=7+x

=>2x-x=7

=>x=7

7: 5x+2=3x+1

=>5x-3x=1-2

=>2x=-1

=>\(x=-\dfrac{1}{2}\)

8: 4x-2=2x+2

=>4x-2x=2+2

=>2x=4

=>x=2

9: \(-2\left[x+3\left(x-1\right)\right]=4+x\)

=>\(-2\left(x+3x-3\right)=x+4\)

=>-2(4x-3)=x+4

=>-8x+6=x+4

=>-9x=-2

=>\(x=\dfrac{2}{9}\)

10: -5[2x-2(x+1)]=6-x

=>-5(2x-2x-2)=6-x

=>6-x=10

=>x=6-10=-4

11: \(\dfrac{3x}{4}=6\)

=>\(3x=4\cdot6=24\)

=>x=24:3=8