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Simplify the following algebraic expressions

1. $4 ( a + 2 ) + 3 ( a - 5 )$
2. $9 a ^ { 2 } b ^ { 3 } \times 2 a b \div 6 a ^ { 3 } b ^ { 2 }$
3. $\frac { 4 x + 2 } { x }$
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(a) $4(a+2) + 3(a-5) = 4a +8 +3a-15 = 7a-7$

(b) $9 a^{2} b^{3} \times 2 a b \div 6 a^{3} b^{2} = 18a^3b^4 \div 6 a^{3} b^{2} = 3b^2$

(c)$\dfrac{4x+2}{x} = 4 + \dfrac{2}{x}$
by Diamond (89,036 points)

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