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A) 2(x - 5) + 4(x + 1) = <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B3%7D%7B10%7D%20" /> 2x - 10 + 4x + 4 = <img src="https://tex.z-dn.net/?

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Julietamape
3

A)

2(x - 5) + 4(x + 1) = <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B3%7D%7B10%7D%20" />

2x - 10 + 4x + 4 = <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B3%7D%7B10%7D%20" />

(2x - 10 + 4x + 4) * 10 = 3

20x - 100 + 40x + 40 = 3

60x - 60 = 3

60x = 3 + 60

x = 63 : 60

x = <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B150%7D%7B100%7D%20%7Dsimplificas" />

x = <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B15%7D%7B10%7D%20%7Dsimplificas" />

x = <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B3%7D%7B2%7D%20" />

b)

6(1 + 2x) - 2(x - 3) = <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B1%7D%7B4%7D%20" />

(6 + 12x - 2x + 6) * 4 = 1

(12 + 10x) * 4 = 1

48 + 40x = 1

40x = 1 - 48

x = <img src="https://tex.z-dn.net/?f=-%20%5Cfrac%7B47%7D%7B40%7D%20" />.