Vhat should be done to these equations in order to solve a system of equations by elimination? 1-3x + 2y = 16
12x + 5y = 21
Multiply the first equation by 3 and the second equations by 2.
Multiply the first equation by 2 and the second equation by 3.
Multiply the first equation by 3.
Nothing needs to be done, since they both equal have 2's and 3's for coefficients.

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First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.