Given the trigonometry expression:
sin 3x = sin(2x+x),
In trigonometry identity;
The expression above will then become;
Recall that sin^2x + cos^x = 1, hence;
This shows that (Proved!)
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8x-3=15x+18 a. x=-3 b. x=3 c. x=2.1 d. x=0.9
1 answer:
8x - 3 = 15x + 18
First, subtract 8x from both sides. / Your problem should look like:
Second, simplify 15x + 18 - 8x to 7x + 18. / Your problem should look like:
Third, subtract 18 from both sides. / Your problem should look like:
Fourth, subtract -3 - 18 to get -21. / Your problem should look like:
Fifth, divide both sides by 7. / Your problem should look like:
= x
Sixth, simplify
to 3. / Your problem should look like: 
Seventh, switch sides. / Your problem should look like:
Answer: x = -3
First, subtract 8x from both sides. / Your problem should look like:
Second, simplify 15x + 18 - 8x to 7x + 18. / Your problem should look like:
Third, subtract 18 from both sides. / Your problem should look like:
Fourth, subtract -3 - 18 to get -21. / Your problem should look like:
Fifth, divide both sides by 7. / Your problem should look like:
Sixth, simplify
Seventh, switch sides. / Your problem should look like:
Answer: x = -3
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