I would rearrange them to know what I had.
0.8x - y = -7.2
20x +32y = 48
Then I would consider taking out the largest factor I could in the second equation. That would be a factor of 4.
For solving by substitution, I would solve the first equation for y which would be -y = -7.2 - 0.8x or
y = 7.2+0.8x
Substitute this value for y into the second equation and go from there.
your first equation tells you what y is, so sub that into the second
20x + 32(.8x+7.2) = 48
solve for x, then sub that x value back into the first equation to get y.
algebra 1 - Solve by substitution. y=.8x+72 20x+32y=48 How do you get y? i got ...
algebra - i need help with these problems (either a solution or how to plug them...
Algebra - 2(0.5-3y) + y > (4y-0.2)8 I understand how to solve the problem, ...
algebra - use substitution to solve the system -5x+24=27 and y=2x+11
Algebra II - If you were to use the substitution method to solve the following ...
Algebra 1- Math - use substitution to solve the system 2x-y=-4 -3x+y=-9
algebra - Use the method of substitution to solve the system. xy=1 4x-y+3=0
Algebra - y=4x-1 y=2x-5 Use substitution to solve each system of equations
algebra - Requesting help. (I must reckon, that X is a variable, and y is y-...
Algebra-Please check - 5 - sqrt of 20x + 4 >= -3 5- 20x + 4 >= -3 5-4 - ...