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First rearrange these simultaneous equations in the form of:
7x-4y = 26
5x-4y = 14
Subtract the bottom equation from the top equation remembering that a - - is equal to a plus. So, -4y - - 4y = 0
2x = 12 and therefore it follows that x = 6
Substitute the value of x into the original equations to find the value of y:
Therefore: x = 6 and y = 4
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What is the slope of the equation 5x plus 4y equals negative 3?
5x+4y = -3 4y = -5x-3 y = -5/4 x - 3 Slope is -5/4.
5x - y equals 27 5x plus 4y equals 42?
27 + y = 42 - 4y so 5y = 15 making y = 3 and x = 6
If you were to solve the following system by substitution what would be the best variable to solve for and from what equation 2x plus 6y equals 9 3x-12y equals 15?
2x + 6y = 93x - 12y = 15Chose the second equation because you can simplify it.3x - 12y = 15 divide by 3 to both sidesx - 4y = 5 add 4y to both sidesx = 4y + 5Replace 4y + 5 for x to the first equation.2x + 6y = 92(4y + 5) + 6y = 98y + 10 + 6y = 914y = -1y = -1/14x = 4y + 5x = 4(-1/14) + 5x = -2/7 + 5x = -2/7 + 35/7x = 33/7
What is 5x equals 4x plus 9?
5x = 4x + 9 x = 9
What is the answer to 5x plus 10 equals 40?
5x+10=40 5x+10-10=40-10 5x=30 5x/5=30/5 x=6
