Объяснение:
3(2х+1)+5(1+3х) = 6х+3+5+15х = 21х+8
3(2x+1)+5(1+3x) = 6x+3+5+15x = (6x+15x)+(3+5) = 21x+8
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Объяснение:
3(2х+1)+5(1+3х) = 6х+3+5+15х = 21х+8
Объяснение:
3(2x+1)+5(1+3x) = 6x+3+5+15x = (6x+15x)+(3+5) = 21x+8