Question

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Answer 1

1)

a)

x=y |•✓2

✓2x=✓2y |-1

✓2x-1=✓2y-1

b)

x=y |:2

x/2=y/2 |+3

x/2+3=y/2+3

2)

$\sqrt{10} x = \sqrt{14} y | \div \sqrt{2} \\ \sqrt{5}x = \sqrt{7} y | + 2 \\ \sqrt{5} x + 2 = \sqrt{7} y + 2$

3)

4a=5b |•3

12a=15b

14c=10d |:2

7c=5d

→12a+7c=15b+5d