Solve the system. 5 8 x - 2 3 y = -3 3 4 x 1 2 y = -4

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -

d. 145*2 is 290 than the total angle is 360 then minus 290 then divide by two

19

step-by-step explanation:

download photomath it will give you the answer and show u the steps