la resolución de:
24 = 3(x +6)
70 = 7 (2+1)
45 = 5 (r +5)
15 = 3 (2+ 6)
-36 = 4 (x -2)
9 = 3 (x -8)
7 = (x -8 )= -28
24= 4 (5x -1)
25= 5 (y -8)
40 = 2 (10z)
56= 7 (x +2)
Respuestas
24= 3(x +6) 70 = 7 (2+1)
3(x +6) =24 7(2+1)
3(x +6)/3 =24/3 7·3=21
x+6=8 70=21
x+6-6=8-6
x=2
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45 = 5 (r +5) 15 = 3 (2+ 6)
5 (r +5)=45 3 (2+ 6)
5 (r +5)/5=45/5 3·8=24
r+5=9 15=24
r+5-5=9-5
r=4
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-36 = 4 (x -2) 9 =3 (x -8)
4(x -2)=-36 3 (x -8)=9/3
4(x -2)/4=-36/4 3 (x -8)/3=9/3
4(x -2)=x-2 x-8=3
-36/4=-9 x-8+8=3+8
x-2=-9 x=11
x-2+2=-9+2
x=-7
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7 (x -8 )= -28 24= 4 (5x -1)
7 (x -8 )/7= -28/7 4 (5x -1)= 24
7 (x -8 )=x-8 4 (5x -1)/4= 24/4
-28/7=-4 5x-1=6
x-8=-4 5x-1+1=6+1
x-8+8=-4+8 5x=7
x=4 5x/5=7/5
5x=7/5
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25= 5 (y -8) 40 = 2 (10z)
5 (y -8)=25 2 (10z)= 40
5 (y -8)/5=25/5 2 (10z)/2= 40/2
y-8=5 10z/10=20/10
y-8+8=5+8 z=2
y=13
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56=7 (x +2)
7 (x +2)=56
7 (x +2)/7=56/7
x+2=8
x+2-2=8-2
x=6
Espero que te sirva :D