Explicación paso a paso:
suelve las ecuaciones(ejercicios del 1 al 10)
* 4(x – 5) = 21
4x-20=21
4x=21+20
x= 41/4
x= 10.25
*4(x–3) = 20
4x-12=20
4x=20+12
x=22/4
x=5.5
*3(x + 2) = 10
3x+6=10
3x= 10-6
x=4/3
x=1.3
*6(x – 7) = 24
6x-42=24
6x= 24+42
x= 66/6
x=11
*2(x + 3) = –10
2x+6= -10
2x= -10-6
x= -16/2
x= -8
*9(x + 1) = 27
9x+9=27
9x= 27-9
x= 18/9
x= 2
*3(x + 5) = –9
3x+15= -9
3x = -9-15
x= 24/3
x= 8
*3(x + 10) = 36
3x+30=36
3x= 36-30
x=6/3
x= 2
* 5(x –1) = –15
5x-5= -15
5x= -15+5
x= -10/5
x= -2
* 5(x – 6) = 13
5x-30= 13
5x= 13+30
x= 43/5
x= 8.6
