7x=2 x等于几

7x=2 x等于几 x^2+7x+10=0 x等于几? (x-1)(x-2)(x-3)(x-4)=(x+5)(x+6)(x+7)求X等于几? 7x*x等于几 7x-5x=20 那么,x等于几 23-(x+3.5x)=7x等于几 x+1=x+2 x等于几? x=2x,求x等于几 2X+X+20=110.X等于几?jikuai 2x=4-x,x等于几 X-1=2X,问x等于几? int x=2; x*7.2/x+1 等于几 |X|=-x x等于几?为什么 x-3分之2-4x+1分之5=1 等于几x等于几 x等于7,则x等于几 负x等于7,则x等于几 x-x=x,x等于几x-x=x,x是几 (X+6)/7=2+1/7*[X-(X+6)/7-2]等于几, (7X+6)-3X=4*(2X+5)等于几?怎么求?