exam Maths Puzzle Numerical Ability

Any help would be really appreciated please. Ta

This is the last of my problems for now, I am really stuck. I do not know how to get the x and the y onto the same side with the = at the end. Ta

I have solve for X and Y

y=9-3x
x=8-2y

Read Solution (Total 0)

exam Other Question

.1X+.99Y+.13Z=.5[X+Y+Z]
.99X+.05Y+.02Z=.24[X+Y+Z]
X:Y:Z=1:.94:2.59[THIS IS THE ANSWER TO THE ABOVE TWO EQUATION.I WOULD LIKE A STEP BY STEP BREAKDOWN AS TO HOW THIS ANSWER WAS O 1.)a man invested part of P150,000 at 12 percent and the remainder at 8 percent. if his annual income from the two investments is P14,560,how much does he have invested at each rat