Verified Answer :

konrad509

15.
\(3x-5+2x=90\\ 5x=95\\ x=19\)

16.
\(\$38.85-\$6=\$32.85\leftarrow\text{this much they spent without the tip}\\ \$32.85\div3=\$10.95\leftarrow\text{this much paid each of them}\\ \$10.95+\$2=\$12.95\leftarrow\text{this is the regular price}\\\)

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