help 10y-10=-20 to explain?
回答 (12)
2009-03-15 1:51 pm
✔ 最佳答案
to solve for y 1st10y-10=-20 add both sides by 10
10y=-20+10 combine like terms
10y=-10 divide both side by 10
y=-1
chcking
10(-1)-10=-20
-10-10=-20
-20=-20 correct!
2009-03-15 10:02 pm
10y - 10 = -20
10y = -20 + 10
10y = -10
y = -10/10
y = -1
10y = -20 + 10
10y = -10
y = -10/10
y = -1
2009-03-15 8:49 pm
y=-1
2009-03-15 8:43 pm
The -10 becmes +10 when moved to the right of the = sign. Thus;10y=+10 -20 which becomes 10y = 10 Then y =10/10 , so y=1
2009-03-15 8:42 pm
First of all, u need to know what u want 2 find
From, this equation, u need 2 find the value of y
u must bring -10 to ur right side
Then u will get this equation
10y = -10
Then u need to find the value of y
y = u divide by 10
y = -1
From, this equation, u need 2 find the value of y
u must bring -10 to ur right side
Then u will get this equation
10y = -10
Then u need to find the value of y
y = u divide by 10
y = -1
2009-03-15 8:40 pm
First you must calculate the value of Y
10y-10=-20
10y=-20+10 ( changing sides of equation changes negative to positive)
10y=-10 --> 10/-10=y ---> y= -1
this makes your equation correct(by substitution)
as (10*-1)-10=-20
10y-10=-20
10y=-20+10 ( changing sides of equation changes negative to positive)
10y=-10 --> 10/-10=y ---> y= -1
this makes your equation correct(by substitution)
as (10*-1)-10=-20
2009-03-15 8:38 pm
10y-10=-20
add +10 both sides
10y -10 + 10= -20 + 10
10y = -10
divide both sides by 10
y = -1. answer
add +10 both sides
10y -10 + 10= -20 + 10
10y = -10
divide both sides by 10
y = -1. answer
2009-03-15 8:37 pm
y= -1 because 10 x -1 is -10 and then - 10 = -20
2009-03-15 8:37 pm
10y - 10 = - 20
10y = - 20 + 10
10y = - 10
y = - 10 / 10
y = - 1
10y = - 20 + 10
10y = - 10
y = - 10 / 10
y = - 1
2009-03-15 8:34 pm
add 10 to both sides
10y = -10
divide both sides by 10
y = -1
10y = -10
divide both sides by 10
y = -1
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