Answer
Ordered Pair Solution $(1.2,-3.6)$
Work Step by Step
We have $$1)4x-1.5y=10.2$$ $$2)2x+7.8y=-25.68$$
(1)-2(2) $$4x-4x-1.5y-15.6y = 10.2+51.36$$ $$-17.1y=61.56$$ $$y=-3.6$$
Solving fo $x$ $$x = (-25.68-7.8*(-3.6))\div2 = 1.2$$
Ordered Pair Solution $(1.2,-3.6)$