Please help me with #4, #10, and #16. I am having trouble woth these. Please show your work so that I may better understand the process.
So let us see how to solve equations by the method of substitution.
The substitution method is used to eliminate one of the variables by replacement when solving a system of equations.
Think of it as "grabbing" what one variable equals from one equation and "plugging" it into the other equation.
2x + 7y = 4 ...(1)
x + 3y = 1.....(2)
we can write 2 as, x = 1 - 3y ...
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