2800
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2800/7 = 400 try looking at it as 28/7 instead, and then adding on the two 00's at the end. 7 goes into 28, four times 28/7=4 therefore: 2800/7=400
400 times 9 is 3600!
400 times greater
To solve the equation 7x = 400 for x, we need to isolate x by dividing both sides by 7. Therefore, x = 400 / 7 = 57.14 (rounded to two decimal places). So, a fifth-grade level answer would be x = 57.
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