What is T In the equation 3/7+t=20/21

Mathematics

1 answer:

stealth61 [152]2 years ago

8 0

Answer:

$\large\boxed{t=\dfrac{11}{21}}$

Step-by-step explanation:

$\dfrac{3}{7}+t=\dfrac{20}{21}\qquad\text{subtract}\ \dfrac{3}{7}\ \text{from both sides}\\\\\dfrac{3}{7}-\dfrac{3}{7}+t=\dfrac{20}{21}-\dfrac{3}{7}\qquad\text{LCD(7, 21)=21}\\\\t=\dfrac{20}{21}-\dfrac{3\cdot3}{7\cdot3}\\\\t=\dfrac{20}{21}-\dfrac{9}{21}\\\\t=\dfrac{20-9}{21}\\\\t=\dfrac{11}{21}$

You might be interested in

Plz help me to find this answer plz

just olya [345]

Answer:

I think the answer would just be 2, I'm not for sure on this one

4 0

2 years ago

Vilka [71]

Answer:

y=4

Step-by-step explanation:

7 0

2 years ago

What is [2times6]-7+92+45 divided by 5

Vesna [10]

$\frac{(2 \times 6) - 7 + 92 + 45 }{5} = \frac{12 - 7 + 92 + 45}{4} = \frac{142}{5} = 28.4$

Hope that helps :)

7 0

2 years ago

6n+n+14=0 i need the math

Fofino [41]

Let's solve your equation step-by-step.6n+n+14=0

Step 1: Simplify both sides of the equation.6n+n+14=0Simplify: (Show steps)7n+14=0

Step 2: Subtract 14 from both sides.7n+14−14=0−147n=−14

Step 3: Divide both sides by 7.7n7=−147n=−2

Answer:n=−2

6 0

2 years ago

What is the closest side lenght of this square? Area=99 square units

Alex Ar [27]

Answer:

3 $\sqrt{11}$

Step-by-step explanation:

$\sqrt{99}$ = 3 $\sqrt{11}$

8 0

1 year ago

Read 2 more answers