Question

solving the system of equation x--2y=5 and 3x+15=-6

Answer 1

x=-7

y=-6

Further Explanation  

One variable linear equation is an equation that has a variable and the exponent number is one. Can be stated in the form:

ax=b  

ax + b = c,

where a, b, and c are constants, x is a variable

Whereas the two-variable linear equation is a linear equation that has 2 variables and the exponent is one

Can be stated in the form:

ax+by=c  

x, y = variable

x--2y=5 ⇒ equation 1

3x+15=-6 ⇒ equation 2

• Solve equation 2 for x

$\tt 3x+15=-6\\\\3x=-21\\\\x=-7$

• Input x to equation 1 for y

$\tt -7-2y=5\\\\-2y=12\\\\y=-6$