two start companies start same time company sates their annual profit follows linear model

Two start up companies start at the same time. Company A sates their annual profit follows a Linear model p (x) 10x 7, where x is the number of units sold, and Company B states their annual profits follows a radical function p (c)=15sqrtx 1+3, where x is the nubmer of units sold and > than 1, how do I solve these equations?
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