How do you solve an equation with no symbol

if it is it parenthesis it means to multiply. Every equation has to have an symbol all symbols are different but the same. If that equation have an letter you multiply that number times the letter.

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

hope it