Answer:
1.56x + `10.15
Explanation:
(5.23x + 3.76) - (3.67x - 6.39) contains a mixture of constants and x-terms. First we perform the indicated multiplication and follow that by grouping like terms together:
5.23x + 3.76 - 3.67x + 6.39 => 1.56x + `10.15