Add 30 by 20 until to get 210

To find how many times you need to add 30 to 20 to reach 210, you can set up the equation as follows:

Let \( x \) be the number of times you add 30:

\[ 20 + 30x = 210 \]

Now, subtract 20 from both sides:

\[ 30x = 210 - 20 \] \[ 30x = 190 \]

Next, divide both sides by 30:

\[ x = \frac{190}{30} \] \[ x = \frac{19}{3} \] \[ x \approx 6.33 \]

Since \( x \) should be a whole number for the context of adding 30 repeatedly, you can add 30 six times:

Starting with 20:

• After 1 time: \( 20 + 30 = 50 \)
• After 2 times: \( 50 + 30 = 80 \)
• After 3 times: \( 80 + 30 = 110 \)
• After 4 times: \( 110 + 30 = 140 \)
• After 5 times: \( 140 + 30 = 170 \)
• After 6 times: \( 170 + 30 = 200 \)

After adding 30 six times, you get 200. If you want to reach exactly 210, you would need to add another 10:

So, in total, you would add 30 six times and then add 10 once to reach 210.