x=5
To solve this, first you need to subtract 9 from x. Which leaves 4(x)=20. Then you divide 4/x and 20/4. X/4= X and 20/4= 5. Therefore x=5.
4(x+9)=20
2 answers
Not so. You cannot just subtract 5 from x, since it inside an expression. You should have checked your work. Using x=5, you have
4(5+9) = 20
4*14 = 20
56 = 20
Bzzzt! But thanks for playing.
To solve an equation, follow the PEMDAS in reverse to isolate x.
4(x+9) = 20
divide both sides by 4 to get
x+9 = 5
Sow subtract 9 to get
x = -4
check: 4(-4+9) = 20
4(5) = 20
20=20
finally!
4(5+9) = 20
4*14 = 20
56 = 20
Bzzzt! But thanks for playing.
To solve an equation, follow the PEMDAS in reverse to isolate x.
4(x+9) = 20
divide both sides by 4 to get
x+9 = 5
Sow subtract 9 to get
x = -4
check: 4(-4+9) = 20
4(5) = 20
20=20
finally!