Question

-3×(4x-0,6y)-(-x+2,8y) "x=-2; y=2"

Answer 1

-3×(4×(-2)-0,6×2)-(-(-2)+2,8×2=-3 ×(-8-0,12)-(2+5,6)=24+0,36-2+5,6=27,96

Answer 2

To solve the expression, substitute x = -2 and y = 2 into the given expression and simplify:

-3 × (4x - 0.6y) - (-x + 2.8y) = -3 × (4(-2) - 0.6(2)) - (-(-2) + 2.8(2)) [Substitute x = -2 and y = 2] = -3 × (-8 - 1.2) - (2 + 5.6) = 24.6

Therefore, -3 × (4x - 0.6y) - (-x + 2.8y) = 24.6 when x = -2 and y = 2.