题目若∣x∣=5|x|=5∣x∣=5,y2=36y^{2}=36y2=36,且y−x<0y-x \lt 0y−x<0,则3x+2y+21=______.3x+2y+21=\_\_\_\_\_\_.3x+2y+21=______.知识点：不等式的性质章节：方程与不等式 / 不等式与不等式组
