Multiply the 6 by 2x and 11 then you would add 15. You should then have on one side getting rid of the parenthesis 12x-51=3x+12. Add 51 and subtract 3x and you should get 9x=63. Then you would divide by 9 and get an answer of 7. To check you would plug 7 into the equation. 6(7•2-11)+15= 33 and 3•7 +12= 33
Step-by-step explanation:
For 2 1/3 of gasoline = 45 miles
For 1 litre of gasoline = 45 / 7/3
Therefore= 135/7 miles
(19.28 miles approx)
Answer:
The numbers are -3 and 18 .
Step-by-step explanation:
Let us assume that first number be x.
Let us assume that the second number be y.
As given
A first number plus twice a second number is 12 .
Than the equation becomes
x + 2y = 12
As given
Twice the first number plus the second totals 33.
2x + y = 33
Than the two equations are
x + 2y = 12
2x + y = 33
Multiply x + 2y = 12 by 2 and subtracted from 2x + y = 33
2x - 2x + y - 4y = 33 - 24
-3y = 9
y = - 3
Put in the equation x + 2y = 12
x + 2 ×-3 = 12
x - 6 = 12
x = 12 + 6
x = 18
Therefore the numbers are -3 and 18 .
Answer:
17
Step-by-step explanation: