Odpowiedź:
a)
2(2y + 4) + 2(y-1) + 2(5x + 2) = 4y + 8 + 2y - 2 + 10x +4 = 6y + 10 + 10x
b)
2(3x + 4) + 2x + y +6 + 3y - 7 = 6x + 8 + 2x + y + 6 +3y - 7 = 8x + 4y + 7
C)
2(x + 7) + 7 - y + 2y + x - 1 = 2x + 14 + 7 - y + 2y + x - 1 = 3x + 20 + y
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Odpowiedź:
a)
2(2y + 4) + 2(y-1) + 2(5x + 2) = 4y + 8 + 2y - 2 + 10x +4 = 6y + 10 + 10x
b)
2(3x + 4) + 2x + y +6 + 3y - 7 = 6x + 8 + 2x + y + 6 +3y - 7 = 8x + 4y + 7
C)
2(x + 7) + 7 - y + 2y + x - 1 = 2x + 14 + 7 - y + 2y + x - 1 = 3x + 20 + y