Question

solve for x and y:
x/2+y=0.8
x+y/2=0.7
please solve it​

Answer 1

Answer:

x = 0.4

y = 0.6

Step-by-step explanation:

Given a pair of linear equations such that,

x/2 + y = 0.8 ........(1)

x + y/2 = 0.7 ........(2)

To solve for x and y.

From eqn (1), we will get,

=> x/2 = 0.8-y

=> x = 2(0.8-y)

Substituting this value in eqn (2), we get,

=> 2(0.8-y) + y/2 = 0.7

=> 1.6 - 2y + y/2 = 0.7

=> 2y - y/2 = 1.6-0.7

=> 3y/2 = 0.9

=> y = 0.9 × 2/3

=> y = 0.3 × 2

=> y = 0.6

Therefore, we will get,

=> x = 2(0.8-0.6)

=> x = 2(0.2)

=> x = 0.4

Hence, the value of x = 0.4 and y = 0.6.

Answer 2

Given:

x/2+y=0.8

x+y/2=0.7

To find:

solve x and y

STEP BY STEP EXPLANATION:

Equation (1)

$\implies$x/2 = 0.8-y

$\implies$x= 2(0.8-y)

Equation (2)

$\implies$2(0.8-y) + y/2 = 0.7

$\implies$1.6 - 2y + y/2 = 0.7

$\implies$2y - y/2 = 1.6-0.7

$\implies$3y/2 = 0.9

$\implies$y = 0.9 x 2/3

$\implies$y = 0.3 x 2

$\implies$y = 0.6

Then,

$\implies$x = 2(0.8-0.6)

$\implies$x = 2(0.2)

$\implies$x= 0.4

Hence, y = 0.6 and x = 0.4