方程组120x×1.2+110y×1.2=97200 10x×1.5+20y×1.5=15000
1个回答
144x+132y=97200
15x+30y=15000
l联立便可解得
相关问题
解二元一次方程组:{1.5*(20x+10y)=15000 (1) 1.2*(110x+120y)=97200 (2)
5×2.5x-100=8×1.5x-60 13×80y-40y=5×2.5×80-100
10×1/3x+5×2/3x+2/5(115-x)×10+3/5(115-x)×5
计算(5x/(x^3-x^2y))×(-x^2y/5)^4×(1/x-1/y)^3 化简结果
(1-10%)X+(100-X)×(1+5%)=100×(1+2%)
y3-y2-y+1/y2-1 × x2-1/x3-x2-x+1 × x-1/y-1
计算:(1)x2-(x3y-2x2y2)﹢xy(2)(1-[1/2])×(1+[1/2])×(1+[1/4])×(1+[
解方程1/2×(x-2)-5=2×(2x-1),2×(z+3/4)+5×(3/10-z)=0
计算:(1)(-7)+(+10)+(-1)+(-2)(2)-22×7-(-3)×6-5÷(-[1/5])(3)4x2y-
3×[(3x-2y)+(x-3y+1)]-2×[2×(3x-2y)-(x-3y+1)]等于几