2*8-5x+8.1=70?3x+1.05*4-5.3=10?

问题描述:

2*8-5x+8.1=70?
3x+1.05*4-5.3=10?

35.2*8-5x+8.1=70
281.6-5x+8.1=70
移项
5x=281.6+8.1-70
5x=219.7
x=219.7÷5
x=43.94

35.2×8 - 5x + 8.1 = 70
281.6 - 5x + 8.1 = 70
5x = 281.6 + 8.1 - 70
5x = 219.7
x = 219.7 ÷ 5
x = 43.94