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morpeh [17]
2 years ago
12

Expand and simplify= a+3b-(5a-4b)

Mathematics
1 answer:
lianna [129]2 years ago
7 0

Answer:

1= -4a+7b

2=(7x-5)/3

Step-by-step explanation:

1,

a+3b-(5a-4b)

expand bracket 1st according to BIDMAS

a+3b-5a+4b

collect like terms

a-5a+3b+4b

ans=-4a+7b

2,

X/3+2x-5/3

solve for the 1st two

X/3 +2x

LCM =3 so,

(x+6x)/3=7x/3

use this and solve the last part

(7x/3)-(5/3)

LCM=3

ans=(7x-5)/3

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