Question

4,
Solve: 5(x + 5) + 6 (y - 3) = -
9 (x - 1) +4 (y - 2) = 4
(A) X=10,Y=-9 (B) x=9.y=-10 (C)
x
= 5,
Y​

Answer 1

Answer:

=5(x+5)+6(y-3)=9(x-1)+4(y-2)=4

=5x+25+6y-18=9x-9+4y-8=4

=5x+6y+7=9x+4y-17=4

=5x+6y+7=4, 9x+4y-17=4

=5x+6y=-3, 9x+4y=21

multiply eq(1)from 9

45x+30y=-27(1)

multiply eq(2)from 5

45x+20y=105(2)

subtract equation (1)from(2)

45x+20y=105

45x+30y=-27

-____-_____+__

-10y=132

______________

-10y=132

y=-13.2

putting the value of y in eq(1)

45x+30(-13.2)=-27

45x+396=-27

45x=-27-396

45x=-423

x=-423/45

x=

Answer 2

Answer:

simplify the equation and we will get

5x + 6y = -11(EQ.1)

9x + 4y = 21(EQ.2)

EQ.1*9 - EQ.2*5

we will get

34y = -204

y = -6

put value of y in EQ.1

5x + 6(-6) = -11

5x = 25

x = 5

value of x and y are 5 and -6 respectively.