1) 4x + 12x² + 9 + 3y + 2x + 11y
6x + 12x² + 14y + 9
2) x² + 2y + 15x² + 4x + 21
4x + 16x² + 2y + 21
3) 8x + 12 + 17y + 3x + y + 8
11x + 18y + 20
Hope this helps :)
He will spend $5.45 if he is driving 85 miles.
How can we figure this out mathematically?
4.36/68=0.064
That means every mile he drives he spends on average 6 cents.
Now 0.064 * 85 equals $5.45.
Please vote my answer brainliest! Thanks.
Answer:
X=18
Step-by-step explanation:
(1/2)*x-7 = (1/3)*(x-12) // - (1/3)*(x-12)
(1/2)*x-((1/3)*(x-12))-7 = 0
(-1/3)*(x-12)+(1/2)*x-7 = 0
x/2-1/3*(x-12)-7 = 0
(-1/3*2*(x-12))/2+x/2+(-7*2)/2 = 0
x-1/3*2*(x-12)-7*2 = 0
1/3*x-14+8 = 0
1/3*x-6 = 0
(1/3*x-6)/2 = 0
(1/3*x-6)/2 = 0 // * 2
1/3*x-6 = 0
1/3*x-6 = 0 // + 6
1/3*x = 6 // : 1/3
x = 6/1/3
x = 18
4- adding because it’s the opposite
