Question

solve it fast.....​

Answer 1

Answer:

2) 4x=17*8-x-y

4x=(136-x-y)/8

4x*8=136-x-y

32x=136-x-y

32x+x+y=136

33x+y=136. (1)

(2y+x)*3=6+5y+2

6y+3x=6+5y+2

y+3x=8. (2)

on solving (1),(2)

30x=128

x=128/30

put x in (2)

3*128/30+y=8

128/10+y=8

y=8-128/10

y=(80-128)/10

y=-48/10

Answer 2

Step-by-step explanation:

i) firstly evaluate the eqⁿ,

$\frac{y + 7}{5} = \frac{(2y - x) + 4(3x - 5)}{4} \\ \frac{y + 7}{5} = \frac{2y + 11x - 5}{4} \\ 4y + 28 = 10y + 55x - 25\\ 28 + 25 = 6y + 55x \\ 53 = 6y + 55x \\ 6y + 55x = 53 \: \: \: \: \: \: .......(1)$

$\frac{21 - 15x +3 - 4y }{6} = 5y - 18 \\ 24 - 15x - 4y = 30y - 108 \\ - 15x - 4y = - 24 - 108 \\ 15x + 4y = 132 \: \: \: ......(2)$

By elimination method, multiply eq(1)with 4 and eq(2)with 6,

eq(1) 220x - 24y = 212

eq (2). 90x + 24y = 792

On adding eq(1),eq(2). We have

310x = 1004

x = 1004/310