七年级英语新课时作业答案

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/24 12:42:26
X-(1/5X+1/5X-15)=3/5X+15 3/5X=X/15我同学也不会做/代表分数线 0.5x(x+4)-0.4(x+4)=3.2 0.5x(x+4)-0.4(x+4)=3.2 x是多少 2-3(x-1)=1-2(1+0.5x) 5 -5x -7 /2=4+x/3 (-x^2+8+5x^3)+(-2x^3+5x-7) 其中x=-2 比较(x+3)(x+6)与(x+2)(x+7) 5x-3>2-4/2x+1 (x+1)(x+2)(x+3)(x+4)-(x^2+5x+3)(x^2+5x+7)=? 2(x^3)^2*x^3-(3x^3)^3+(5x)^2*x^7 -7+13-6+20= (-49)-(+91)-(-5)+(-9)= 1+(-2)+|-2-3|-5= (-5)x(-7)-5x(-6)= 2*(2.5x-1)=13.6-3(x-2)解方程 5x+ 4/6 ≥ 7/8 -1-x/3 6-2分之5x+7=-4分之x+17的解是多少? (1)2分之5-3x=3分之3+5x (2)4分之x+2-6分之2x-3=1 (3)12分之x-1=15分之2x (4)5分之y+17-4分之3y-7=-2 4分之x—7-3分之5x+8=1 X=几?5X-4=40 5(X-4)=40 (48-3X)÷3=0 X+5X-7X=几?5X-4=40 5(X-4)=40 (48-3X)÷3=0X+5X-7=11 7+2{5-3[11-4(5x-3)]}=-1 解方程.X+4/5=2 1/5X+1/2X=3/4 X-5/7=1/3解方程.X+4/5=2 1/5X+1/2X=3/4 X-5/7=1/3 X-7/8=5/12 已知方程2(X+1.5X)=25,请填写下表: X 1 2 3 4 5 6 7 … 2(X+1.5X) ( ) ( ) ( ) ( )已知方程2(X+1.5X)=25,请填写下表: X 1 2 3 4 5 6 7 …2(X+1.5X) ( ) ( 3(x+2.5)=5x x=3.75 为什么是这样做 (5x+2)(x-2) -5(x+1)(x-3)怎么做 x+5=5x÷3怎么做? 5*(x-1/3)=2 5x(x-1/3)=25*(x-1/3)=2 5x(x-1/3)=2 15(x+3)=141 1/2{1/3[1/4(1/5x+5)-4]+3}=1,x=== 2.4-( x-4)/2.5=3/5x(2x+1)/3-(x-5)=3/2 2.4- (x-4)/2.5=3/5x 怎么写 3(5x+4)+4(x-1)=2-12(5x-5) 3\5{1\3[-3\4-(4\3-1)-x\2-3\4]-3\4]-3\4+5}=1-2\5x x=? 2/5 x+ x-1/2和3(x-1)/2-8/5x 4-3×(2-x)=5x 2(x+4)-3(5x+1)=2-x