Question

please only you do the (d) and (e)..........
I am not getting it and this app is for helping students like me ........

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Answer 1

Answer:

(d) 2x-3y=17;4x+y-13=0

2x-3y-17=0;4x+y-13=0

For y

y=-4x+13

Substitute y in

2x-3(-4x+13)=17

14x=56

x=4

Substitute x in

y=-4(4)+13

=-16+13=-3

y=-3

Therefore x,y=4,-3

(e)x+2y-7=0;2x-y-4=0

x=-2y+7

substitute x in

2(-2y+7)-y=4

-5y=-10

y=2

substitute y in

x=-2(2)+7

x=-4+7

x=3

Therefore x,y=3,2

plz mark it as the brainliest answer

Answer 2

$\huge{\mathcal{\blue{\underline{\underline{\pink{HeYa!!!}}}}}}$

${\large{\purple{\mathbb{ANSWER}}}}$

${\large{\blue{\bold{\underline{Given:-}}}}}$

d)

▪︎ 2x-3y = 17 ---(1).

▪︎ 4x+y-13 = 0

=》 4x+y = 13. ---(2).

${\large{\blue{\bold{\underline{Now,:-}}}}}$

▪︎ By Multiplying eq(2) by 3 we get,

=》 3{4x+y = 13}

=》 12x+3y = 39. ---(3).

▪︎ By Adding eq(1) and eq(3) we get,

=》 (2x-3y)+(12x+3y) = 17+39.

=》 2x-3y+12x+3y = 56.

=》 2x+12x+3y-3y = 56.

=》 14x = 56.

=》 x = 56/14.

${\large{\green{\boxed{\bold{=》\:x\:=\:4.}}}}}$

${\large{\blue{\bold{\underline{So,}}}}}$

By putting the value of x in eq(1) we get,

=》 2(4) - 3y = 17.

=》 8 - 3y = 17.

=》 -3y = 17-8.

=》 -3y = 9

=》 y = 9/-3

${\large{\green{\boxed{\bold{=》\:y\:=\:-3.}}}}}$

Therefore the required value of x and y is 4 and -3 respectively.

----------------------

e)

${\large{\red{\bold{\underline{Given:-}}}}}$

▪︎x+2y-7 = 0.

=》 x+2y = 7. ---(1).

▪︎ 2x-y-4 = 0

=》 2x-y = 4. ---(2).

${\large{\red{\bold{\underline{Now,}}}}}$

▪︎ By Multiplying eq(1) by 2 we get,

=》2{x+2y = 7}

=》 2x+4y = 14. ---(3).

${\large{\red{\bold{\underline{So,}}}}}$

▪︎ By subtracting eq(2) from eq(3) we get,

=》 (2x+4y) - (2x-y) = 14-4.

=》 2x+4y-2x+y = 10

{By Opening Brackets}

=》 5y = 10.

=》 y = 10/5.

${\large{\green{\boxed{\bold{=》\:y\:=\:2.}}}}}$

${\large{\blue{\bold{\underline{Now,}}}}}$

▪︎ By putting the value of y in eq(1) we get,

=》 x+2(2) = 7.

=》 x+4 = 7.

=》 x = 7-4.

${\large{\green{\boxed{\bold{=》\:x\:=\:3.}}}}}$

Therefore the required value of x and y is 3 and 2 respectively.

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