Question

giúp mình bài này với😭

Answer 1

1: =>15x-3-x^2+2x+x^2-13x=7

=>4x-3=7

=>4x=10

=>x=5/2

2: =>4x+8-14x+7+27x-36=30

=>17x-21=30

=>17x=51

=>x=3

3: =>10x-16-12x+15=12x-16+11

=>-2x-1=12x-5

=>-14x=-4

=>x=2/7

4: =>3x^2-6x-3x^2-3=x^2+1-x^2+2x

=>-6x-3=2x+1

=>-8x=4

=>x=-1/2

5: =>15x+25-8x+12=5x+6x+36

=>7x+37=11x+36

=>-4x=-1

=>x=1/4

6: =>7x+7+6x^2-3x-6x^2-30x=-42

=>-26x=-49

=>x=49/26