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3m + 4n = -135m + 6n = -19Solve the equation elimination method.

Sagot :

Answer:

m= 1, n = -4

Explanation:

Given the simultaneous equation

3m + 4n = -13 ...1 * 5

5m + 6n = -19....2 * 3

_______________________

15m + 20n = -65

15m + 18n = -57

Subtract the resulting equation:

20n - 18n = -65-(-57)

2n = -65+57

2n = -8

n = -8/2

n = -4

Substitute n = -4 into equation 1;

From1:

3m + 4n = -13

3m + 4(-4) = -13

3m - 16 = -13

3m = -13 + 16

3m = 3

m = 3/3

m = 1

Hence the value of m is 1

The solution to the system of equation (m, n) is (1, -4)

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