Question

Solve by substitution method 3 X upon 3 minus 5 Y upon 2 is equals to minus 4 and X upon 2 + Y upon 3 is equal to 13 upon 7

Answer 1

Answer:

28

Step-by-step explanation:

3-3+5+2-4+2+3+13+7=

Answer 2

Answer:

3x/3 - 5y/2 = -4 ------------------(i)

X/2 + y/3 = 13/7 ------------------(ii)

on solving equation (i)

6x - 15y = - 4 × 6

6x - 15y = - 24 --------------(a)

on solving equation (ii)

3x +2y = 13×6/7

3x - 2y = 78/7. ---------------(b)

multiple by 2 in equation (b)

6x - 15y = -24

6x - 4y = 78/7

-___________

- 19y = -90/7

y = 90/133 = 12.857

and X = (15×90/133-24)/6

X = -2.308