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19.04.2020 •
Mathematics
X/5 + 7 = -3
Solve for x
Solved
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Ответ:
x= -50
Step-by-step explanation:
To solve for x, we need to isolate x
x/5 + 7 = -3
Subtract 7 from both sides to "reverse" the addition
x/5=-10
Multiply both sides by 5 to "reverse" the division being done to x
5*x/5= -10*5
x= -50
Ответ:
step-by-step explanation:
given : line p is parallel to line r
to prove : ∠1 is supplementary to ∠7
proof :
1) line p is parallel to line r (given)
∠2=∠3 ( corresponding angles of parallel lines are equal)
∠3=∠7 ( vertically opposite angles are equal)
∴ ∠2 ≅ ∠7
2) ∠2 ≅ ∠7 ( from above reason i.e. corresponding angles and vertically opposite angles )
⇒ m∠2=m∠7
3) m∠2=m∠7 ( equal angles have equal measures)
4) since ∠1 and ∠2 forms a linear pair as there is a line cut by transversal because of which ∠1 and ∠2 forms a linear pair
⇒ ∠1 is supplementary to ∠2.
5) ∠1 is supplementary to ∠2. ( ∵ ∠1 and ∠2 forms a linear pair.)
6)
reason : ∠1 is supplementary to ∠2.
now, we use m∠2=m∠7 in the above equation,
so it becomes,
7)
reason: by substituting ∠2=∠7
⇒ ∠1 is supplementary to ∠7.
8) ∠1 is supplementary to ∠7 (∵ )
hence proved.