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Use the linear combination method to solve this system of equations. What is the value of x? 3x+7y=31 and -3x-2y=-1

User Almighty
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in this one, is about the same as the previous one, if you set them both at y = mx+b, slope-intercept form, you'll notice the slopes are the same, whilst the y-intercepts differ.

so both lines are parallel, and never meet.

User Suely
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