exam Maths Puzzle Numerical Ability

solve the following system of equations by the substitution method:

4x=3y+30
3y-5x=-33

after substituting, find the remaining equation and the y coordinate of the solution.

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exam Other Question

Please Solve using the quadratic formula?? someone plesae help i dont even know what the quadratic formula is!!! 5x^2 - 3x - 3 = 0 THE RANDOLPHS USED 12 MORE GALLONS OF FUEL OIL IN OCTOBER THAN IN SEPTEMBER AND TWICE AS MUCH OIL IN NOVEMBER AS IN SEPTEMBER. IF THEY USED 132 GALLONS FOR THE THREE MONTHS, HOW MUCH WAS USED DURING EACH MONTH?

THANKS FOR ANY HELP.