Answer:
The correct answer by solving question no 1 is
a=(d-c)/b
Step-by-step explanation:
ab+c=d
or,ab=d-c
Therefore,a=(d-c)/b
Answer:
AB=18cm
Step-by-step explanation:
sabendo que sin∅=0.6 então
0.6=AB/30cm ⇒ AB=0.6*30cm ⇒ AB=18cm
3x+4y=5
2x+3y=
-2(3x+4y)=5(-2)
3(2x+3y)=4(3)
-6x-8y=(-10)
6x+9y=12
Add the equations
-6x-8y=(-10)
+ 6x+9y=12
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0x+y=2
y=2
Substitue y into an equation
6x+9(2)=12
6x+18=12
6x=-6
x = -1
y = 2