Posted by **Gilda** on Monday, April 19, 2010 at 6:43am.

Solve the pairs of simultaneous equations by the substitution method.

5x-9y=17

3x-8y=5

- Math -
**Reiny**, Monday, April 19, 2010 at 6:54am
(poor method for this particular question, but ...)

solve the second for x, (I look for the smallest coefficient)

3x = 5+8y

x = (5+8y)/3

sub into the first

5(5+8y)/3 - 9y = 17

multiply by 3 to eliminate fractions

5(5+8y) - 27y = 51

25 + 40y - 27y = 51

13y = 26

y = 2

then x = (5+16)/3 = 7

## Answer This Question

## Related Questions

- math - how do i solve two step equations? Do you mean two equations in two ...
- Linear Equations - Can you please help solve this equation using the ...
- Substitution Method - Use the Substitution method to solve the system of ...
- math - solve the simultaneous equations to find the coordinates of the point of ...
- Substitution Method-Plz help - Use the Substitution method to solve the system ...
- Maths - Solve the following simultaneous equation by substitution method 5x+y=35...
- Math - Solve these simultaneous linear equations using elimination method : 3a...
- maths - using the substitution p=1/x, q=1/y, solve simultaneous equations 1/x-5/...
- math - solve using the substitution method....(solutions must be in ordered ...
- math ALGEBRA - Solve by either the substitution method or the addition or ...

More Related Questions