Question

resolva as equações em R

3(2x-3)+2(x+1)=3x+18
2x+3(x-5)=4x+9
2(x+1)-3(2x-5)=6x-3

Answer 1

3(2x-3)+2(x+1)=3x+18
6x -9 +2x +2 = 3x +18
6x +2x -3x = 18 +9 -2
8x -3x = 27 -2
5x= 25
x= 25/5
x= 5

2x+3(x-5)=4x+9
2x +3x -15 = 4x +9
2x +3x -4x = 9 +15
5x -4x = 24
x= 24

2(x+1)-3(2x-5)=6x-3
2x +2 -6x +15 = 6x -3
2x -6x -6x = -3 -2 -15
2x -12x = -5 -15
-10x = -20 . (-1)
10x = 20
x= 20/10
x= 2

Bons estudos!