x+y=5
by elimination,substitution or through the matrix method.
You cant solve it unless it is an equation. To be an equation it must have an equals sign.
-2
Since the second equation is already solved for "y", you can replace "y" by "9" in the other equation. Then solve the new equation for "x".
You'd need another equation to sub in
by elimination,substitution or through the matrix method.
You cant solve it unless it is an equation. To be an equation it must have an equals sign.
-2
That's exactly the purpose of the substitution method ... to get an equation with one less variable. When you have it, you solve it for the variable that's left.
Since the second equation is already solved for "y", you can replace "y" by "9" in the other equation. Then solve the new equation for "x".
You'd need another equation to sub in
This is not Calculus.y=7(Already solved)substiute y=7 into y=8xtherefore 7 = 8xtherefore x = 7/8
There are no disadvantages. There are three main ways to solve linear equations which are: substitution, graphing, and elimination. The method that is most appropriate can be found by looking at the equation.
G-Given U-Unknown E-Equation S-Substitution S-Solve
-3x = 3 + y 3 + y - 5y = -21 -4y = -24 y = 6 x = -3
what is the solution of x-5y=10 and 2x-10y=20
(2,3)