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The equation is 2a-15=-1
It is possible to work out what a is (as I am going to show below), but as there is no y in this equation, you cannot work out what y is.
We have to firstly try and get rid of the -15, so we add 15 to each side, leaving us with 2a=14. To get a on its own, we divide each side by 2, leaving us with a=14.
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What does 2A minus 18A equal to?
-16A
What is the answer to -2a minus 4 equals -16.8?
-2a - 4 = -16.8 -2a = -12.8 a = -12.8/-2 a = 6.4
How do you solve this math problem a squared plus 2a minus 15 equals 0?
a2 + 2a - 15 = 0This can be factorised:a2 + 2a - 15 = (a - 3)(a + 5) = 0So a = 3 and -5.A more robust way is to shove it into the general solution:If αx2 + βx + η = 0, then x = (-β ± √(β2 - 4αγ)) / 2αSo if a2 + 2a - 15 = 0, then:a = (-2 ± √(22 - 4*1*-15)) / 2*1a = (-2±√(64))/2 = (-2±8)/2a = -10/2, 6/2a = -5, 3
9a plus 8 minus 2a minus 3 minus 5a?
2a-5
What is the answer to 15 - a - 2 equals 2a plus 1?
a = 4
