Question

$5x + 8y = 34 \\ \\ 7x + 2y = 20$
Find x and y.​

Answer 1

hope it helps

have a great day

also.. this is irrelevant but which grade math is this?.. as it's not there in my math book..

Answer 2

Step-by-step explanation:

$\bf{ \bold{ question \: : - }}$

$5x + 8y = 34.......(1) \\ \\ 7x + 2y = 20........(2) \\ \\ Find \: x \: and \: y$

Solution:-

$\implies{ \bf{5x = 34 - 8y}}$

$\implies{ \bf{x = \frac{34 - 8y}{5}...........(3)}}$

Puting x value in Equation (2)

${ \bf{7x + 2y = 20}}$

$\implies{ \bf{ 7 \times \frac{34 - 8y}{5} + 2y = 20}}$

$\implies{ \bf{ \frac{238 - 56y}{5} + 2y = 20}}$

$\implies{ \bf{ \frac{238 - 56y + 10y}{5} = 20}}$

$\implies{ \bf{ \frac{238 - 46y}{5} = 20}}$

$\implies{ \bf{238 - 46y = 100}}$

$\implies {\bf{ - 46y = 100 - 238}}$

$\implies{ \bf{ - 46y = - 138}}$

$\implies{ \bf {y = \frac{138}{46}}}$

y = 3

Puting yvalue in Equation (3)

$\bf{ x = \frac{34 - 8y}{5}}$

=> x = 34-8×3/5

=>x = 34-24/5

=> x = 10/5

=> x = 2

_______________________________________

• Final value Of

\bf{x = 2}}

And,

\bf{y = 3}}