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3x+8y=-13,14x=(3y)/(5) =-10

User Franzine
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1 Answer

2 votes

Answer:

(~1.6,~-8.6)/(1.599,-8.597)

Explanation:

This uses the system of equations, if you'd like to find more examples. First, let's mess with the first equation and solve for the easiest findable variable.

1. 3x+8y = -13 -> x = (-13-8y)/3 & y = (-13-3x)/8

2. Using the x equation because it's easier to use when entering into the second equation, we can get 14(-13-8y/3)

(-182-112y)/3 = -10 = 3y/5 is then our new eqn,

Then, we can make the fractions on the right and left equal and find y

9y/15 = -910-560y/15 ->

9y = -910-560y

569y = -910

y = 1.599

3. Now, insert 1.599 into the first x equation we made, x = (-13-8y)/3

to get x = -8.597

4. Your solution is 1.599, -8.597 or ~1.6,~-8.6

User JEuvin
by
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