Question

Раскройте скобки и проведите подобные слагаемые. -7(2m-3)+10(5-6m) ; -4(2a-3)+3(4-2a); 3(5a-2)+5(6-4a); (8x-3)×(-4)+(7x-5)×3

Answer 1

1) -14m+21+50-60m= 71-74m
2) -8a+12+12-6a= 24-14a
3) 15a-6+30-20a= 24-5a
4) -32x+12+21x-15= -3-11x

Answer 2

-7(2m-3)+10(5-6m)
-14m+21+50-60m
-74m+71
=============
-4(2a-3)+3(4-2a)
-8a+12+12-6a
-14a+24
=============
3(5a-2)+5(6-4a)
15a-6+30-20a
-5a+24
=============
(8x-3)•(-4)+(7x-5)•3
-32x+12+21x-15
-11x-3