Question

решите, срочно.
1)-3,7a+2,6b+4a-7b
2)8×(7m-2)-3×(4m+6)
3)-1,8c×20d

Answer 1

1) - 3,7a + 2,6b + 4a - 7b = 0,3а - 4,4b
2) 8 * (7m - 2) - 3 * (4m + 6) = 56m - 16 - 12m - 18 = 44m - 34
3) - 1,8 c * 20d = - 36cd