13x-x=24 1.1x+2.2=5.5-3.3x 6-5x=3/4-4x [给金币,13x-x=24 1.1x+2.2=5.5-3.3x 6-5x=3/4-4x

问题描述:

13x-x=24 1.1x+2.2=5.5-3.3x 6-5x=3/4-4x [给金币,
13x-x=24
1.1x+2.2=5.5-3.3x
6-5x=3/4-4x

原来这是三个方程,啊!!!!!!!!

(1)13x-x=24解12x=24 x=24/12 x=2(2)1.1x+2.2=5.5-3.3x解 4.4x=5.5-2.2 4.4x=3.3 x=0.75(3)6-5x=3/4-4x解 6-9x=3/4 9x=6-3/4 9x=5.25 ...