161k views
0 votes

(x)/(4) - (3)/(8)y = 3 \\


(5)/(3)x - (y)/(2) = 12
How to solve the following simultaneous pair of equation by substitution both. ​

User Alex Berg
by
8.3k points

1 Answer

1 vote

Answer:

(6, - 4 )

Explanation:

Given the 2 equations


(x)/(4) -
(3)/(8) y = 3 → (1)


(5)/(3) x -
(y)/(2) = 12 → (2)

Multiply (1) by 8 and (2) by 6 to clear the fractions

2x - 3y = 24 → (3)

10x - 3y = 72 → (4)

Rearrange (3) expressing - 3y in terms of x by subtracting 2x from both sides

- 3y = 24 - 2x

Substitute 3y = 24 - 2x into (4)

10x + 24 - 2x = 72, that is

8x + 24 = 72 ( subtract 24 from both sides )

8x = 48 ( divide both sides by 8 )

x = 6

Substitute x = 6 in either (3) or (4) and solve for y

Substituting in (3)

2(6) - 3y = 24

12 - 3y = 24 ( subtract 12 from both sides )

- 3y = 12 ( divide both sides by - 3 )

y = - 4

Solution is (6, - 4 )

User Langpavel
by
7.8k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories