y=4x , 2y + 2.5x = 105
Substituting y=4x in 2y + 2.5x = 105, we get;
=) 2(4x) + 2.5x = 105
=) 8x + 2.5x = 105
=) 10.5x = 105
=) x = 105 × 10/105
=) x = 10
Substituting x = 10 in y=4x, we get;
=) y = 4(10)
=) y = 40
Therefore, the value of x is 10 and y is 40
