Question

1)12-10x=25-30x

2)3(2x+3)-2(4x-5)=10x+21

Answer 1

1.

12 - 10x = 25 - 30x

<=> 12 - 25 = -30x + 10x

<=> - 20x = -13

<=> x = 13/20

2.

3(2x+3) - 2(4x - 5) = 10x+21

<=> 6x + 9 - (8x - 10) = 10x + 21

<=> 6x + 9 - 8x + 10 = 10x + 21

<=> -2x + 19 = 10x + 21

<=> -12x = 2

<=> x = -1/6

Answer 2

1: =>-10x+30x=25-12

=>20x=13

=>x=13/20

2: =>6x+9-8x+10=10x+21

=>10x+21=-2x+19

=>12x=-2

=>x=-1/6