Solve the following system of equations. 0.12x - 0.07y = -1.35 0.4x + 0.8y = 4.8

x = -6 and y = 9

Step-by-step explanation:

It is given that,

0.12x - 0.07y = -1.35    (1)

0.4x + 0.8y = 4.8   (2)

To find the value of x and y

eq(1) * 100 ⇒

12x + 7y = -135   (3)

eq(2) /0.4 ⇒

x + 2y = 12   (4)

eq(4) * 12 ⇒

12x + 24y = 144   ---(5)

eq(5) - eq(3) ⇒

12x + 24y = 144   ---(5)

12x - 7y = -135  (3)

 0  + 31y = 279

y = 279/31 = 9

Substitute the value of y in eq(4)

x + 2y = 12   (4)

x + 2*9 = 12

x = 12 - 18 = -6

Therefore x = -6 and y = 9

your answer would be 10x - 1

step-by-step explanation:

the multiplicative inverse of a fraction a/b is b/a. for the multiplicative inverse of a real number, divide 1 by the number. for example, the reciprocal of 5 is one fifth 1/5 or 0.2, and the reciprocal of 0.25 is 1 divided by 0.25, or 4.