astultz309459
24.12.2019 •
Mathematics
Which operation should be performed last to solve the inequality below?
–7x + 4 > –10
a
divide each side by –7 and reverse the inequality symbol
b
subtract 4 from each side
c
multiply each side by –7 and reverse the inequality symbol
d
add 4 to each side
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Ответ:
-7x + 4 > -10
-7x > -14
x < 2
Ответ:
4x = 64
x = 16
1b) 5x + 2x + 5x + 2x = perimeter = 98
2×5x + 2×2x = 10x + 4x = 14x = 98
14x = 98
x = 7
1c) 5×(x+4) = 45
5x + 20 = 45
5x = 25
x = 5