An equation, 2 / 2 x + 4 / 4 = 8 / 5
1 / 2 x = 8 / 5-1 / 4, 1 / 2 x = 27 / 20, x = 27 / 10
(4.5-0.5) x + 1 = 5.8 equation
4x=4.8
x=1.2
(x + 18) △ 4 = 120; column equation
Come on, come on, come on~~~
x+18=120x4
x+18=480
x=462
4 (x-18) = 3.28 equations!
0.4(x-18)=3.28
x-18=8.2
x=8.2+18
x=26.2