Solve the equation {x + y + Z = 6,2x-y + Z = 3,4x-y + 2Z = 8 speed!

Solve the equation {x + y + Z = 6,2x-y + Z = 3,4x-y + 2Z = 8 speed!

x+y+z=6 ①
2x-y+z=3 ②
4x-y+2z=8 ③
① + 2: 3x + 2Z = 9, 4
③ - 2: 2x + Z = 5, 5
2 * 5 - 4: x = 1
If we take x = 1 into 4, we get 3 + 2Z = 9
z=3
When x = 1 and z = 3 are brought into (1), the following results are obtained
1+y+3=6
y=2
So the solution of the equations is: x = 1
y=2
z=3

If we know that the ratio of 2x-y to x + y is equal to 3 / 2, then what is x divided by Y

Simple! Make an equation: (2x-y) / (x + y) = 2 / 3. Will you solve this fractional equation? The final result is 1.25 (that is 5 / 4)

Given 2x-y = 10, find the value of [square of X + square of Y) - (square of X-Y) + 2Y (X-Y)] divided by 2Y

First, x = (y + 10) / 2
[x^2-(x-y)^2+y^2+2y(x-y)]/2y
=[(x+x-y)(x-x+y)+y^2+2y(x-y)]/2y
=[(2x-y)y+y^2+2y(x-y)]/2y
By substituting x = (y + 10) / 2, we can simplify the calculation
Answer 10

Given 2x-y = 8, find the value of [(x ^ 2 + y ^ 2) - (x ^ 2-y ^ 2) + 2Y (X-Y)] divided by 4
emergency

[(x^2+y^2)-(x^2-y^2)+2y(x-y)]/4
=(2y^2+2xy-2y^2)/4
=xy/2
2x-y=8 y=2x-8
xy/2=x(2x-8)/2=x(x-4)=x^2-4x
If we give 2XY = 8
Then XY / 2 = 4 / 2 = 2

What is the operation method of dividing 160 by 3 / 4

160 * 4 / 3 = is multiplied by its reciprocal

A divided by B is 71000 parts of a to 10 parts of B

If a / b = 7, then a = 7b
a/1000：b/10=7b/1000：b/10=7:100

What's two out of seven equal to six out of 26? What's ten out of ten equal to 16 divided by?

35 56

What is 3.12 divided by 6? What is 6 divided by 3.26

3.12÷6=0.52
6÷3.26=600/326=300/163

Six times nine equals six

54

One in seven times five in twelve plus five in twelve divided by seven in five
The method is simple and convenient

1/7*5/12+5/12÷7/5
=1/7*5/12+5/12*5/7
=5/12*(1/7+5/7)
=5/12*6/7
=5/14