Question

Solve the following pair of linear equations by the substitution method. 0.2x + 0.5y = − 0.5 and 0.5 x + 0.3y = −2.2​

Answer 1

Step-by-step explanation:

so this question's answer is x=-0.5 and y= 1

Answer 2

Answer:

Is (–5, 0.5) a solution of this system?

x – 4y = –7,

0.2x + 2y = 0

Substitute (–5, 0.5) into x – 4y = –7 to get

✔ –5 – 4(0.5) = –7

.

Substitute (–5, 0.5) into 0.2x + 2y = 0 to get

✔ 0.2(–5) + 2(0.5) = 0

.

Simplify the above equations to get

✔ –7 = –7 is true and 0 = 0 is true; a solution.

Step-by-step explanation: