a) x = y
5x- y= 4
b) y =2x + 1
4x + y= 13
c)5y - x = 3
x = 3 - y
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a)
x=y
5y-y=4
4y=4/:4
y=1
x=1
b)
y=2x+1
4x+y=13
4x+2x+1=13
6x=13-1
6x=12/:6
x=2
y=2*2+1
y=5
c)
5y-x=3
x=3-y
5y-(3-y)=3
5y-3+y=3
6y=3+3
6y=6/:6
x=3-1=2
{5y-y=4
{x=y
{4y=4
{y=1
{x=1
{4x+2x+1=13
{y=2x+1
{6x=12
{x=2
{y=2·2+1=5
{y=5
{5y-(3-y)=3
{x=3-y
{5y-3+y=3
{6y=6
{x=3-1=2
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a)
x=y
5y-y=4
x=y
4y=4/:4
x=y
y=1
x=1
b)
y=2x+1
4x+y=13
y=2x+1
4x+2x+1=13
y=2x+1
6x=13-1
y=2x+1
6x=12/:6
y=2x+1
x=2
y=2*2+1
x=2
y=5
c)
5y-x=3
x=3-y
5y-(3-y)=3
x=3-y
5y-3+y=3
x=3-y
6y=3+3
6y=6/:6
y=1
x=3-1=2
a) x = y
5x- y= 4
{5y-y=4
{x=y
{4y=4
{x=y
{y=1
{x=1
b) y =2x + 1
4x + y= 13
{4x+2x+1=13
{y=2x+1
{6x=12
{y=2x+1
{x=2
{y=2·2+1=5
{x=2
{y=5
c)5y - x = 3
x = 3 - y
{5y-(3-y)=3
{x=3-y
{5y-3+y=3
{x=3-y
{6y=6
{x=3-y
{y=1
{x=3-1=2
{y=1
{x=2