0.8x+0.5x13=10.

问题描述:

0.8x+0.5x13=10.

0.8 x + 0.5 x 13 = 10.5
0.8 x + 6.5 = 10.5
0.8 x = 10.5 - 6.5
0.8 x = 4
x = 5

0.8x=10.5-0.5x13
0.8x=10.5-6.5
0.8x=4
x=5

0.8x+0.5x13=10.5
0.8x+6.5=10.5
0.8x=10.5-6.5
0.8x=4
x=5

0.8x+0.65=10.5
0.8x=10.5-0.65
0.8x=4.85