Question

solve by cross multiplication method :
0.4x - 1.5y = 65.
0.3x - 0.2y = 0.9

Answer 1

0.4x - 1.5y =65
0.3x -0.2y=0.9

multipleing 0.3 in upper term and 0.4 in lower term both side
answer will be
0.12x - 0.45y=19.5
0.12x - 0.08y=0.36
---------------------------------------
//////// -0.37y = 19.14. x &x will be reduce
----------------------------------------
Y =51.729. and substitute value of y in any eq.
0.4x - 1.5 y = 65
y=51.729

0.4x - 1.5×51.729=65
0.4x- 77.5935=65
0.4x = 142.5935

X = 142.5935/0.4
x=240.0935

Answer 2

x = -31.49 and y = -51.73