解方程2.8x=19.32-6.4x5(y-4)-7(7-y)-9=12-3(9-y)
来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/10/08 22:21:22
解方程
2.8x=19.32-6.4x
5(y-4)-7(7-y)-9=12-3(9-y)
2.8x=19.32-6.4x
5(y-4)-7(7-y)-9=12-3(9-y)
(1)2.8x=19.32-6.4x,
2.8x+6.4x=19.32-6.4x+6.4x,
9.2x=19.32,
9.2x÷9.2=19.32÷9.2,
x=2.1;
(2)5(y-4)-7(7-y)-9=12-3(9-y),
5y-20-49+7y-9=12-27+3y,
12y-78=3y-15,
12y-78+78=3y-15+78,
12y-3y=3y+63-3y,
9y=63,
9y÷9=63÷9,
y=7.
2.8x+6.4x=19.32-6.4x+6.4x,
9.2x=19.32,
9.2x÷9.2=19.32÷9.2,
x=2.1;
(2)5(y-4)-7(7-y)-9=12-3(9-y),
5y-20-49+7y-9=12-27+3y,
12y-78=3y-15,
12y-78+78=3y-15+78,
12y-3y=3y+63-3y,
9y=63,
9y÷9=63÷9,
y=7.
(Y-2)/3=X(Y-4)/5=X(Y-6)/7=X(Y-8)/9=XY/11=X求Y和X是多少?方程.我没学过.我自
怎么接XY的方程 7x+5y+3(y-6)=176这个方程怎么解?x+y+(y-6)=38
不解方程2x+y=6,x-3y=1,求7y(x-3y)^2-2(3y-x)^3 的值
求方程(x+y)/(x^2-xy+y^2)=3/7的整数解
用换元法解下列方程:3分之2(x+y)+4分之x-y=4分之9;3(x+y)-2(2x-y)=3
问4道数学解方程-3(x-3)=3x+43(3y-1)-12=2(5y-7)4(5y+4)+3(y-1)=24-(5y-
解方程:1){x-1=3(y-2)2(x-1)=5y-18; 2)2x+3y/4+2x-3y/3=7,2x+3y/3+2
解方程:(1)4x+7y=10 (2)x+y-z=0 6x-11y+28=0 x+2y-z=3 2x-3y+2z=5
解题解方程式Y=3X+2Y=5X+4Y=7X+6Y=9X+8Y=11X 大家帮我看看这是个什么方程?是不定式方程吗?如何
解方程(3x+2y)/4=x+1/3y=3(x-2)+y
解方程:(2x+y+6)/2=(4x-3y-7)/3=(10-6x-7y)/4
(2014•道里区三模)在函数y=2x5+3x