Posted by **DJ** on Friday, January 20, 2012 at 9:11pm.

Please help me to solve by substitution method.

7x+8y =44

x=41-5y

- Math question -
**Patty**, Friday, January 20, 2012 at 9:58pm
7 x 41-5y+8y=44

287+3y=44

3y=-287+44

3y=-243

y=-243 divided by 3

y=81

- Patty is incorrect - Math question -
**Reiny**, Friday, January 20, 2012 at 11:08pm
Patty should have used brackets

in 7x + 8y = 44

7(41-5y) + 8y = 44

287 - 35y + 8y = 44

-27y = -243

y = 9

then in x= 41-5y

x = 41-45

x = -4

so x=-4 and y = 9

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