49 l 65° l2 zº ot T = I y PLEASE HELP FIND MISSING. ANGLES​

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.

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

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