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2x+14grade+29minute40secunde= 20 de grade
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Răspuns :

Renatemambouko
2x+14⁰+ 29' 40"= 20⁰
2x= 20⁰-14⁰ - 29' 40"
2x= 6⁰ - 29' 40"
2x= 5⁰ 59' 60" - 29' 40"
2x=5⁰ 30' 20"
x=(5⁰ 30' 20"):2
x=2⁰ 45' 10"

x-18⁰14'57"=3*(11⁰21'10")
x-18⁰14'57"=33⁰63'30"
x=33⁰63'30" +18⁰14'57"
x=51⁰77'87"
x=51⁰78'27"
x=52⁰18'27"







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