What is expand-2(5x-4y=-9) ?

The solution to expand-2(5x-4y=-9) is -10x+8y=18

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expand-2(5x-4y=-9)

expand

- 2 (5 x - 4 y = - 9)

- 10 x + 8 y = 18

Solution steps

- 2 (5 x - 4 y = - 9)

= - 2 (5 x - 4 = y - 9)

Distribute parentheses

= (- 2) \cdot 5 x + (- 2) (- 4 y =) + (- 2) (- 9)

Apply minus-plus rules

+ (- a) = - a, (- a) (- b) = ab

- 2 \cdot 5 x + 2 \cdot 4 y = 2 \cdot 9

Simplify

- 2 \cdot 5 x + 2 \cdot 4 y = 2 \cdot 9 : - 10 x + 8 y = 18

- 10 x + 8 y = 18

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