1) 6х + 3 + 5 + 15х = 21х + 15
2) 8 + 4х - 3 - 3х = 1х + 5
3) 10n + 20m - 8m - 28n = 2n - 8m
4) 55c + 11d + 3d + 3c = 58c + 13d
Объяснение:
все просто)
1) 3(2х+1) +5(1+3х)=6х+3+5+15х= 21х+8
2) 3(2+х)-3(1+х)=6+3х-3-3х=3-х
3) 10(n+m)-4(2m+7n)=10n+10m-8m-28n=-18n+2m
4) 11(5c+d)+3(d+c)=55c+11d+3d+3c=58c+14d
1) 6х + 3 + 5 + 15х = 21х + 15
2) 8 + 4х - 3 - 3х = 1х + 5
3) 10n + 20m - 8m - 28n = 2n - 8m
4) 55c + 11d + 3d + 3c = 58c + 13d
Объяснение:
все просто)
1) 3(2х+1) +5(1+3х)=6х+3+5+15х= 21х+8
2) 3(2+х)-3(1+х)=6+3х-3-3х=3-х
3) 10(n+m)-4(2m+7n)=10n+10m-8m-28n=-18n+2m
4) 11(5c+d)+3(d+c)=55c+11d+3d+3c=58c+14d