Answer:
Nico, Raj and Sandra are correct
Step-by-step explanation:
we have
[tex]\frac{2}{5}(5+x)=8[/tex]
Method 1
Solve for x
That means ----> isolate the variable x
we have
[tex]\frac{2}{5}(5+x)=8[/tex]
Multiply by 5/2 both sides
[tex](\frac{5}{2})\frac{2}{5}(5+x)=(\frac{5}{2})8[/tex]
[tex]5+x=20[/tex]
subtract 6 both sides
[tex]5+x-5=20-5[/tex]
[tex]x=15[/tex]
Method 2
Solve for x
That means ----> isolate the variable x
we have
[tex]\frac{2}{5}(5+x)=8[/tex]
Multiply by 1/2 both sides
[tex](\frac{1}{2})\frac{2}{5}(5+x)=(\frac{1}{2})8[/tex]
[tex]\frac{1}{5}(5+x)=4[/tex]
Multiply by 5 both sides
[tex](5)\frac{1}{5}(5+x)=(5)4[/tex]
[tex]5+x=20[/tex]
subtract 6 both sides
[tex]5+x-5=20-5[/tex]
[tex]x=15[/tex]
Method 3
Solve for x
That means ----> isolate the variable x
we have
[tex]\frac{2}{5}(5+x)=8[/tex]
Apply distributive property left side
[tex]\frac{2}{5}(5)+\frac{2}{5}(x)=8[/tex]
[tex]2+\frac{2}{5}(x)=8[/tex]
subtract 2 both sides
[tex]2+\frac{2}{5}(x)-2=8-2[/tex]
[tex]\frac{2}{5}(x)=6[/tex]
Multiply by 5/2 both sides
[tex](\frac{5}{2})\frac{2}{5}(x)=(\frac{5}{2})6[/tex]
[tex]x=15[/tex]
therefore
Nico, Raj and Sandra are correct
