8t+5h=220

5t+h=112

1 answer

To solve the system of equations:

  1. \( 8t + 5h = 220 \) (Equation 1)
  2. \( 5t + h = 112 \) (Equation 2)

We can use substitution or elimination. Here, we will use the substitution method.

First, solve Equation 2 for \( h \):

\[ h = 112 - 5t \]

Now substitute this expression for \( h \) into Equation 1:

\[ 8t + 5(112 - 5t) = 220 \]

Distribute \( 5 \):

\[ 8t + 560 - 25t = 220 \]

Combine like terms:

\[ -17t + 560 = 220 \]

Now isolate \( t \):

\[ -17t = 220 - 560 \] \[ -17t = -340 \] \[ t = \frac{-340}{-17} = 20 \]

Now that we have \( t \), substitute it back into the expression for \( h \):

\[ h = 112 - 5(20) \] \[ h = 112 - 100 = 12 \]

Thus, the solution to the system of equations is:

\[ t = 20, \quad h = 12 \]

In conclusion:

  • \( t = 20 \)
  • \( h = 12 \)