x+10=20 then you subtract 10 from both sides x=10
10
it means that x should equal 10. x + x = 20. x = 10
x = 20
-20 = -4x - 6x -20 = -10x -20 / -10 = -10x / -10 2 = x x = 2
x+10=20 then you subtract 10 from both sides x=10
10
it means that x should equal 10. x + x = 20. x = 10
1
20
x = 20
x = 20
-20 = -4x - 6x -20 = -10x -20 / -10 = -10x / -10 2 = x x = 2
what is the solution of x-5y=10 and 2x-10y=20
4x-5y=20 x-3y=10 becomes x=3y-10 plug that into the first equation: 4(3y-10)-5y=20 12y-40-5y=20 7y=60 y=60/7 If x=3y-10, then x=3(60/7)-10 x=180/7 - 70/7 x=110/7
x-6-x-4=10-x-10=10-xx=20
x = 20