diketahui sistem persamaan linear 3x+4y=-46 dan 2x=5y. nilai 4x-3y adalah? mohon dibantu^_^

2x = 5y
x = 2,5y
3x + 4y = (3 × 2,5y) + 4y = 7,5y + 4y = 11,5y
11,5y = -46
y = -46 ÷ 11,5 = -4
4x - 3y = (4 × 2,5 × (-4)) - (3 × -4) = -40 - (-12) = -28.