Question

A) Xby 5+7=3 find the value of x
B) 2x+5=21
C) 3x-16=5
D) 2(x+4)=12
E)2x(-2)=20x +14
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Answer 1

Answer:

E

Step-by-step explanation:

2*(-2) =20*+14 is the right answer

Answer 2

$\sf\huge\bold{\underline{\underline{{Solution}}}}$

how to solve:

step1: Taking LCM or removing brackets and expanding the terms.

Step2:Make like terms together.

Step3:Shifts all constant value to constant side and let Variable alone on the other side.

A) x/5+7= 3

⇨x/12=3

⇨x= 12×3

⇨x= 36

Check:-

⇨x/12

⇨36/12

⇨3

LHS = RHS (Verified)

B) 2x+5=21

⇨ 2x= 21-5

⇨2x= 16

⇨x=16÷ 2=8

⇨x=8

check:-

⇨2(8)+5

⇨16+5

⇨21

LHS = RHS (Verified)

C) 3x-16=5

⇨3x= 5+16

⇨3x= 21

⇨x= 21÷ 3

⇨x= 7

Check:-

⇨3(7)-16

⇨21-16

⇨5

LHS = RHS (Verified)

D) 2(x+4)=12

⇨2x+8=12

⇨2x=12-8

⇨2x=4

⇨x=4÷2

⇨x=2

check:-

⇨2(2+4)

⇨2(6)=12

LHS =RHS(Verified)

E) 2x(-2)=20x+14

⇨-4x=20x+14

⇨-4x-20x= 14

⇨-24x= 14

⇨x= - 14/24= -7/12

Check:

⇨-4(-7/12)= 20(-7/12)+14

⇨ 28/12= 14/6=7/3

⇨-140/12+14

⇨ -70/6+14= -70+84/6= 14/6= 7/3

LHS= RHS (Verified)