13 -0.5 2.7 123 0 2/5 -4 -7/4 整数有哪些?

13 -0.5 2.7 123 0 2/5 -4 -7/4 整数有哪些? (1)3.5x+x-14=18.4 (2)2.7*2-1.5x=0 (3)13x-6.8x+x=46.8 (4)17.5-0.5x=12.7 (5)5x-1.4x=54 0.5*3.7的2次方-3.7*2.7+0.5*2.7的2次方 (123-123+123-123+123-123)+0+7+(-7)=? 2.7*5-2x=0.5怎么算 解方程 2.7×2-1.5x＝0 2(x－0.7)＝4.8 1解方程2.7×2-1.5x＝0 2(x－0.7)＝4.8 13x-6.8x+x＝46.8 (1)3.5x+x-14=18.4 (2)2.7*2-1.5x=0 (3)13x-6.8x+x=46.8 (4)17.5-0.5x=12.7 (5)5x-1.4x=54解方程,x代表未知数.并写出过程. 2.7*1.58+2.7*2.42+0.5怎样简便 数学题在线解答123*2/13+246*1/13+369*3/13= 2.7-0.5x=2. ansys直接建立有限元模型问题finish/clear/prep7n,1,0,0,0n,2,0,0.5,0n,3,0,1,0n,4,0.5,1,0n,5,1,1,0n,6,1,0.5,0n,7,1,0,0n,8,0.5,0,0n,9,0,0,0.5n,10,0,1,0.5n,11,1,1,0.5n,12,1,0,0.5n,13,0,0,1n,14,0,0.5,1n,15,0,1,1n,16,0.5,1,1n,17,1,1,1n,18,1,0.5,1n -(0.5-13/4+(-2.75)-(-11/2) 如何用matlab解二元方程[x,y]=solve('1351.565-14.85*13-379.25*x-1.025*y.^2-27.25*y = 0','222.5-2.7*13-27.75*x-0.45*y.^2-2.05*x*y-0.36*13*y=0','x','y')Error using ==> solve>getEqns at 182' 1351.565-14.85*13-379.25*x-1.025*y.^2-27.25*y = 0 ' is n 90.4除以2.7的余数是（）.A.0 B.13 C.1.3 D.0.13 计算：（-13/2)×2/3-0.5×2/7+1/3×(-13/2)-5/7×0.5简便、、 123+123+1+2+3 123*46+123+123*55-2*123怎么简算? 123的空集是多少?我只知道子集是123 真子集是1,2,3,12,13,23,还有个就是空集请问123的空集是多少