exam Maths Puzzle Numerical Ability

I am having problems with the following system of equations. The elimination method is supposed to be used, and the solution is to be in the form of integers or fractions.

.03x-0.2y=4
.04x+0.5y=63/19

Thanks!

Stephanie

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exam Other Question

write an equation of the line.Express it in standard form.
through (8,3)and(-4,3)
A number is 2 1/10 more than its reciprocal. Find the number.
{2/3, 3/5, 5/4, 5/2}

Please teach me how to do this in order by order!!! PLEASE!!! Thank you.