Respuesta:
1.-
20 – 7x = 6x – 6
20 – 7 (2) = 6 (2) – 6
20 – 14 = 12 – 6
6 = 6
2 .-
7x+2 = 10x+5
7 (-1)+2 =10 (-1)+5
-7 + 2 = -10 + 5
-5 = -5
3.-
6x−5 = 8x+2
6 (-7/2) −5=8 (-7/2) +2
-42 /2 -5 = -56 / 2 + 2
-21 – 5 = -28 + 2
-26 = -26
4.-
4 (2) + 4 + 9 (2) + 18 = 12 (2+2)
8 + 4 + 18 + 18 = 12 (4)
48 = 48
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Respuesta:
1.-
20 – 7x = 6x – 6
20 – 7 (2) = 6 (2) – 6
20 – 14 = 12 – 6
6 = 6
2 .-
7x+2 = 10x+5
7 (-1)+2 =10 (-1)+5
-7 + 2 = -10 + 5
-5 = -5
3.-
6x−5 = 8x+2
6 (-7/2) −5=8 (-7/2) +2
-42 /2 -5 = -56 / 2 + 2
-21 – 5 = -28 + 2
-26 = -26
4.-
4 (2) + 4 + 9 (2) + 18 = 12 (2+2)
8 + 4 + 18 + 18 = 12 (4)
48 = 48