lukerothbacher lukerothbacher

02-02-2019
Mathematics

contestada

3x + 4y = 5
X- 3y = -7

Solve by substitution

Respuesta :

meredith48034 meredith48034

02-02-2019

x = 3y - 7
3x + 4y = 5

3(3y - 7) + 4y = 5
9y - 21 + 4y = 5

13y - 21 = 5

13y = 26

y = 2

x - 3(2)= -7

x - 6 = -7

x = -1

(-1, 2)

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