Hardest Algebra Question

Algebra Very difficult question. Solving the systen using a linear combination. "Please help.?
Solve linear system using the linear combination. 1.2x – 2.5Y = -3.5 from 1.4 to 5.5 = 1.5y Please explain how to make response. I was present when the lesson has been taught well I have no idea how. Thank you.
(A) 1.2 x – = 2.5Y -3.5 (B) 1.4 – 5.5 = 1.5y (A) = 12/10x – 25/10y = -35 / 10 = 6/5x – 5/2y = -7 / 2 (B) 14 = 10x – 7/5x = 55/10 = 15/10y – 3/2y = 11 / 2 – (A) – 1 / 6 (A) = -6/5x 5/2y + – + = 02.07 + 7.12 5/12y 1/5x = – 7/5x = 49/12 35/12y + (B) + (-A) – 1 / 6 (A)) = 7/5x – 3/2y – 35/12y + 7/5x = 11 / 2 + 49/12 = 0 + y = = 17/12y 115/12 115/17 (A = 6/5x) – 5/2y = -7 / 2 = 6/5x – 575 / 34 = -7 / 2 = x = 6/5x 456/34 2280/204 = 570/51 = 190/17
Algebra SAT MATH Problem NLC

