The method of solving "by substitution" works by solving one of the equations (you choose which one) for one of the variables (you choose which one), and then plugging this back into the other equation, "substituting" for the chosen variable and solving for the other. Then you back-solve for the first variable.
Answer:
The two numbers are 3 and 5
Step-by-step explanation:
Multiply top equation by 4 to cancel out the Ys
Since X =5, we can plug it into either of the top two equations to find out the value of Y
To double check
25 is equal to 1/4
to find 1/4 of a number, you divide the number by 4.
the equation here is:
x ÷ 4 = 40
to solve, do 40 x 4 = 160
x = 160
40 is 25% of 160
Answer:
the firs tone is right
Step-by-step explanation:
5 x 2x = 10x + 5 x 8 = 40 which is 10x + 40
Answer:
y = 3
Step-by-step explanation:
The equation of a horizontal line parallel to the x- axis is
y = c
where c is the value of the y- coordinates the line passes through.
here the line passes through (0, 3) with y- coordinate 3
y = 3 ← is the equation of the horizontal line
