Answer:
I think it is answer A
Step-by-step explanation:
i don't know
3(x - 8) = 4
3(x) - 3(8) = 4
3x - 24 = 4
+ 24 + 24
3x = 28
3 3
x = 9¹/₃
Answer:
x-5=4 or simply 4+5
Step-by-step explanation:
Im not sure if this is how you mean they both have a way of showing the sum of 4 and 5.
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Define x :
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Let the two digit number be 10x + y.
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Construct Equation :
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<span>Four times the units digit is six less than twice the tens digit
</span>⇒ 4y = 2x - 6
⇒2y = x - 3
⇒ x = 2y + 3
<span>The number is nine less than three times the number obtained by reversing the digits.
</span>⇒10x + y = 3(10y + x) - 9
⇒ 10x + y = 30y + 3x - 9
⇒ 7x = 29y - 9
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Solve for x and y :
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x = 2y + 3 ----------------------- (1)
10x = 29y - 9 ------------------- (2)
Sub (1) into (2) :
7(2y + 3) = 29y - 9
14y + 21 = 29y - 9
15y = 30
y = 2 ------------------- Sub into (1)
x = 2(2) + 3
x = 7
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Find the number:
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Number = 10x + y = 10(2) + 7 = 27
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Answer: The 2-digit number is 27.
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