Объяснение:
1)7*(4а+6)-12а = 28а+42-12а = 16а - 42
2)8х-4*(16-2х) = 8х-64+8х = 16х - 64
3)1.7*(а-4)+0.6*(6-2а) = 1.7а-6.8+3.6-1.2а = 0.5а - 3.2
4)1.5*(8х-6у)-(5у-3х)*2.4 = 12х-9у-12у+7.2х = 19.2х - 21у
5)-(4.3х-2.4)-(5.8-2.6х)=-4.3х+2.4-5.8+2.6х=1.7х-3.4
Объяснение:
1)7*(4а+6)-12а = 28а+42-12а = 16а - 42
2)8х-4*(16-2х) = 8х-64+8х = 16х - 64
3)1.7*(а-4)+0.6*(6-2а) = 1.7а-6.8+3.6-1.2а = 0.5а - 3.2
4)1.5*(8х-6у)-(5у-3х)*2.4 = 12х-9у-12у+7.2х = 19.2х - 21у
5)-(4.3х-2.4)-(5.8-2.6х)=-4.3х+2.4-5.8+2.6х=1.7х-3.4