9514 1404 393
Answer:
Step-by-step explanation:
When x represents the number, "the sum of 3 and a number" is (x+3). Twice that sum is 2(x+3). "Is 30" means this expression is equal to 30:
2(x +3) = 30 . . . . an equation for the given conditions
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We can solve this equation by dividing by 2:
x + 3 = 15
x = 12 . . . . . . subtract 3
The number is 12.
Easy! Parallel lines never cross
Step-by-step explanation:
Well make them a fraction : -2/16 = 8/x. Find the value of x.
<span><span><span>
−2/</span>16</span>=<span>8/x</span></span>
<span><span>−<span>2*x</span></span>=<span><span>(8)</span>*<span>(16)</span></span></span><span><span>
−<span>2x</span></span>=128</span>
<span><span><span>−<span>2x/</span></span><span>−2</span></span>=<span>128/<span>−2</span></span></span><span>
x=<span>−<span>64
</span></span></span>-2/16 = 8/-64 (True)
Hoped I helped!
Answer:
Step-by-step explanation:
I'll help you just let me figure this out real quick, do you still want the answer?