substitute x = -11 + y in 10x - 5y = -10
10(-11+y)-5y=10 distribute 10 with -11 and y
10(-11) + 10(y) - 5y=10 =>> -110 +10y -5y =10
combine like terms -110 +5y=10
add 110 to both sides to get the variable on one side 5y = 10+110 (120)
5y=120 divide both sides by 5 to get variable by itself 120/5=24
so y = 24
now replace the y with 24 to find x
x=-11+24 24 - 11 = 13
x=13
therefore, y=24 and x=13
hope this helps :)
