Solve the system of linear equations below.
x+y=4
2x+3y=0

x=12 and y=-8

Step-by-step explanation:

The given system of linear equations:

Multiply 2 on both sides in equation (1), we get

Using elimination method, eliminate equation (3) from (2), we get

When we substitute the value of y in equation (1), we get

Hence, the solution of the given system is x=12 and y=-8.

answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°