37.51°等於_______°________′________〃
37.51°等於37°30‘36’
X-Y=Z X+Y+Z=80已知Y等於10求X和Z
X-Z=10
X+Z=70
X=40
Z=30
X+X*2.25%*80%=5090等於多少
x + x*2.25%*80% = 5090
x + 0.0225x*0.8 = 5090
x + 0.018x = 5090
1.018x = 5090
x = 5090÷1.018
x = 5000