2(x^2+5)=60 to 2x^2+10=60
distributive property (a(b+c)=ab+ac)
2x^2+10=60 to 2x^2=50
property of equality or something like thht (a=a and b=b, so a-b=a-b) and also
addative inverse (a+-a=0) (added -10 to both sides)
2x^2=50 to x^2=25
propery of euality and multiplicative inverse (a times 1/a=1) and one produce property (1 times a=a)
x^2=25 to x=+/-5
property of equality and something else
Answer:
Step-by-step explanation:
5k+ 6k+9k=20k
20k=£60
k=3£
£15, £18, £27
Answer:
<h2>
</h2>
Step-by-step explanation:
<h3>
</h3>
<u>First of all multiply through by 7</u>
We have
<h3>
</h3>
<u>Expand the terms in the bracket</u>
That's
<h3>
</h3>
<u>Add 16x to both sides</u>
That's
<h3>
</h3>
<u>Divide both sides by 30</u>
We have the final answer as
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Hope this helps you