My class just went into a lockdown 2021 (practice not real)

The square root of 9x plus 7 plus the square rot of 2x equall to 7

Type the correct answer in each box. spell all the words correctly, and use numerals instead of words for numbers. if necessary, use / for the fraction bar(s).

Three friends are comparing the prices of various packages of golf balls at a sporting goods store. hector finds a package of 6 golf balls that costs $4.50.