# Chapter 1 - Review Exercises - Page 108: 4

$84$

#### Work Step by Step

Substituting $8$ into $x$ and $10$ to $y$: $3(2y+x) \\=3(2\cdot 10 + 8)$ Simplify within the parentheses. Perform the multiplication first and addition next: $\\=3(20+8) \\=3(28)$ Multiply. $\\=84$

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