Correct option is (d) x = 4, y = –0.5
0.25x + 0.6y = 0.7 ........(1)
0.3x − 3.5y = 2.95 .....(2)
Multiply (1) by 3 and (2) by 2.5, we get
0.75x + 1.8y = 2.1 .......eq3
0.75x − 8.75y = 7.375 ........eq4
Subtracting both equations, we get
10.55y = −5.275
y = −0.5
Substitute the value of y in (1),
0.25x −0.3 = 0.7
0.25x = 0.10
x = 4
Hence, x = 4 and y = −0.5.