answersLogoWhite

0

Given:

15x - 20y = -1

15y = 2 + 5x

Then:

15x -20(2 + 5x)/15 = -1

∴15x -40/15 - 100x/15 = -15/15

∴225x/15 - 100x/15 = 40/15 - 15/15

∴125x = 25

∴x = 1/5

Check:

15(1/5) - 20(1/5) = -1

∴3 - 4 = -1

∴-1 = -1

User Avatar

Wiki User

15y ago

What else can I help you with?

Related Questions

Solve the equation by substitution method x-y equals 5?

x+y=5


Use the substitution method to solve the system of equations Choose the correct ordered pair 2x plus 3y equals 13 x equals 2?

(2,3)


Use the substitution method to solve the system of equations Enter your answer as an ordered pair?

Use the substitution method to solve the system of equations. Enter your answer as an ordered pair.y = 2x + 5 x = 1


How can you solve a linear equation?

by elimination,substitution or through the matrix method.


Can quadratic systems be solved using elimination and substitution?

You can solve lineaar quadratic systems by either the elimination or the substitution methods. You can also solve them using the comparison method. Which method works best depends on which method the person solving them is comfortable with.


How do you solve x plus y equals 4 and y equals 2X plus 1 by substitution method?

If: x+y = 4 and y = 2x+1 Then: 4-x = 2x+1 => 3 = 3x => 1 = x So by substitution: x = 1 and y = 3


When solving by the substitution method what happens when one variable cancels out?

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.


Solve by substitution method y equals -4x - 7 y equals 3x?

y= -4x-7 y=3x 3x= -4x-7 3x+4x=7 7x=7 x=1


Who Invented the Substitution Method?

The substitution method in mathematics is a technique used to solve systems of equations by isolating one variable and substituting it into the other equation. The method is not attributed to a single inventor, as it has been used by mathematicians for centuries. The concept of substitution in algebra can be traced back to ancient civilizations such as the Babylonians and Greeks, who used similar methods to solve mathematical problems.


Solve using substitution x minus y equals 2 and x plus y equals -4?

-2


How do you solve a problem using the substitution method?

You solve this by theoretically diverting the hypotenuse of the x divided by the overall beneficial procedure of y


What 4x y14 and 2x y8 solve using substitution?

You cant solve it unless it is an equation. To be an equation it must have an equals sign.