Question

Найдите значения узора*
1) 3(a+2b)-a, здешний a+3b=1,1
2) 2,4(3x+5y)-4y, здешний 0,9x+у=2
3) 8(0,5a+3b)+8a, здешний a+2b=2,5
4) 3(0,6m+5n)-3n, здешний 0,3m+2n=4

Answer 1

1) = 3a + 6b - a = 2a + 6b = 2(a + 3b) = 2 • 1.1 = 2.2;
2) = 7.2 x + 12y - 4y = 7.2x + 8y = 8(0.9x + y) = 8 • 2 = 16;
3) = 4a + 24b + 8a = 12a + 24b = 12(a + 2b) = 12 • 2.5 = 30;
4) = 1.8m + 15n - 3n = 1.8m + 12n = 6(0.3m + 2n) = 6 • 4 = 24