You can multiply or divide one equation so that it has a variable with a coefficient opposite of the other equation.
Example:
A) 2x + 3y = 6
B) 4x +2y = 20
Notice that neither equation has a "1" or "-1"
Let's multiply Equation A) by -2
A) -4x -6y = -12 Then add it to B)
B) 4x +2y = 20
-4y = 8
y= -2
A) 2x + 3*-2 = 6
2x = 12
x = 6
Answer:
234
Step-by-step explanation:
The consecutive terms of the sequence have a common difference d
d = 17 - 10 = 24 - 17 = 7
This indicates the sequence is arithmetic with n th term
= a₁ + (n - 1)d
where a₁ is the first term and d the common difference
Here a₁ = 10 and d = 7 , thus
= 10 + (32 × 7) = 10 + 224 = 234
A man has 21 sheep, one out of every 4 are red, how many are red
21/4 = 5.25
A man has 21 bricks he glues every 4 pieces together how many pieces does he have now
21/4 = 5.25
A man has 21 kids, he only keeps 1 ojut of every 4, How many kids did he keep
21/4 = 5.25
A dog sees 21 rabbits he kills 3 out of every 4, how many left?
21/4 = 5.25
