emmaculatemumbua14 emmaculatemumbua14

15-04-2021
Mathematics

contestada

x+y=7
3x+y=15
solve by substitution method

Respuesta :

lolabae2 lolabae2

15-04-2021

Step-by-step explanation:

x =7-y

subs x in eqn 2

3(7-y)+y=15

21-3y+y=15

21-2y=15

21-15=2y

6=2y

y=6/2

y=3

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