Round to the place value of the underlined digit 862,840

x+y=90

x=30-y=x

step-by-step explanation:

if you understand you will get the answer

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

hope this ! ^w^