1239 = 94m + b
810 = 61m + b

The values are

m = 13

b = 17

Step-by-step explanation:

1239 = 94m + b eqn 1

810 = 61m + b eqn 2

Let's take eqn 1, let's make b the subject of the formula

1239 - 94m = b

Since b = 1239 - 94m

Insert the value of b into the eqn 2

810 = 61m + (1239 - 94m)

810 = 61m + 1239 - 94m

Collect like terms

810 = 61m - 94m + 1239

810 = - 33m + 1239

810 - 1239 = - 33m

- 429 = - 33m

The minus sign cancels each other

Making m the subject

m = 429 / 33

m = 13

Since we've gotten the value for m, insert the value of m= 13 into the eqn 1

1239 = 94m + b

m = 13

1239 = 94 (13) + b

1239 = 1222 + b

1239 - 1222 = b

17 = b

b = 17

m = 13

b = 17

y = -1

x = 8

hope this !

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step-by-step explanation:

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