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How do you solve linear combination 5x equals 4y-30 and 2x plus 3y equals -12?
Here is one possible method of solving the system: 5x = 4y - 302x + 3y = -12Rewrite to line up variables:5x - 4y = -302x + 3y = -12Multiply the top equation by 2 and the bottom equation by 5:10x - 8y = -6010x + 15y = -60Subtract the two equations:-23y = 0;So y = 0; plug back into an original equation to find x:2x + 3(0) = -122x = -12x = -6The solution to the system is x = -6 and y = 0, or the point (-6,0).
Find two numbers whose sum is 57 and whose difference is 11?
x + y = 57x - y = 11Add: 2x = 68x = 34y = 57 - x = 23Check: 34 - 23 ?=? 11 ? Yes. yay !
Find -x when x equals 35?
If x equals 35, then -x equals -35.
X equals 6 equals x equals 5 plus x equals 13 plus x equals 20?
x=6=x=5+x=13+x=20 x cannot = x+5. This question has no answer.
What does 8x-6 equals 18 mean?
8x - 6 = 188x = 18 + 68x = 24x = 24 / 3x = 3Check to see if your answer is correct: 8(3) - 6 = 1824 - 6 = 1818 = 18The answer is correct!
