Step-by-step explanation:
4x+5y=4 (equation 1)
2x-y=9 (equation2)
solving equation 1 and 2 and multiplying equation 2 by 2
4x+5y=4
4x-2y=18
- + -
________
7y= -14
y= -2
putting the value of y in equation 2
2x-y=9
2x+2=9
2x=7
x=3.5
Answer:
Step-by-step explanation:
Show that if 3x – 7 = 5, then x = 4.
Here, our given statement is 3x – 7 = 5, and we're asked to prove x = 4.
x=4
Statements Reasons
1. 3x – 7 = 5 Given
2. 3x – 7 + 7 = 5 + 7 Addition of 7 to equation (1)
3. 3x + 0 = 5 + 7 Substitution of –7 + 7 = 0 into (2)
4. 3x = 5 + 7 Substitution of 3x + 0 = 3x into (3)
5. 3x = 12 Substitution of 5 + 7 = 12 into (4)
6. 3x⁄3 = 12⁄3 Dividing equation (5) by 3
7. x = 12⁄3 Substitution of 3x⁄3 = x into (6)
8. x = 4 Substitution of 12⁄3 = 4 into (7)
Is there such a thing as being too descriptive? Yep, and that was it, since over half the proof was devoted to telling the reader how to do arithmetic. We'll typically take numerical computation for granted, and write proofs like this:
I'm not 100% sure but this is how I would try.
If you don't get a better answer, check this w/your teacher.
x/100 *90,000 = 1200
90,000x = 120,000
x = 1.3% tax percentage
1.3/100x = 2200
1.3x = 220,000
x = $169,230.77 assessed value
A plane has two dimensions and extends infinitely in both dimensions.
No question was asked buy i'll try to answer anyway.
either im assuming its asking how many vans or how many missing seats.
26+32 58 students total,
You would need 6 vans to carry them, and 2 seats would be missing.
If this isnt what you were looking for please comment a question and i'll try to help
