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When solving for two equations with two variables, take one equation (it doesn't matter which one) and solve for one of the variables (it doesn't matter which one).
4x + 7y = 47
7y = 47 - 4x
y = 47/7 - (4/7)x
Now plug that value for the variable you solved for into the other equation
5x - 4y = -5
5x - 4(47/7 - (4/7)x) = -5
5x -188/7 + (16/7)x = -5
(51/7)x = 153/7
51x = 153
x = 3
Now plug that value into either equation to solve for the other variable.
4x + 7y = 47
4(3) + 7y = 47
12 + 7y = 47
7y = 35
y = 5
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How do you solve 2y equals 4x plus 4?
2y = 4x + 4y = 2x + 2
What is the system of equations and enter the solution as an ordered pair 4x 7y equals 47 5x-4y equals -5?
Do you mean: 4x+7y = 47 and 5x-4y = -5 Then the solutions to the simultaneous equations are: x = 3 and y = 5
How do you solve 4x - 4y plus 7 equals 15?
4x - 4y + 7 = 15to get it into y-intercept form do this...4x -4x - 4y + 7 - 7 = 15 - 7 - 4x-4y = 8 - 4x-4y / -4 = (8 / -4) + (-4x / -4)y = x + 2you did not give any values to plug in so this is as best an answer i can give
What is the answer 3x equals 4y-x?
3x=4y-x 4x=4y x=y
What is the solution of this system 3x plus 4y equals 5 x-4y equals 7?
Add the two equations and get 4x = 12 so x = 3 and y = -1
