Help plzzzzzzzzzz !!!!!
1 answer:
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Answer:
20x-10
Step-by-step explanation:
Cows have legs and 3 toes on each leg, if we want to find the number of toes of ONE cow we have to multiply the legs by the toes giving the following:
But we have two cows so (1) we have to multiply it by 2 giving a total of:
By the other hand chickens have legs and 7 toes on each leg, if we want to find the number of toes we have to multiply the legs by the toes giving the following:
To find the total amount of toes we have to add (2) and (3)
ANSWER
The solution is
EXPLANATION
We want to solve the simultaneous equations
and
.
We substitute equation (2) in to equation (1), to obtain
This has now become a linear equation in a single variable .
We solve for x by grouping like terms.
We divide through by negative 3 to get;
.
Hence, the solution is