Can you please explain the steps to solving this

x=360

Step-By-Step Explanation:

x= a+102 + b+168

since a+b is 90,

x= 90+102+168

x= 360

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Step-by-step explanation:

a+12= 12 added with a

90 = a + b (remeber this)

b+78= 78 added to b

a+120 = a +12+90

b + 168= 90 + b + 168

x= a +120 + b + 168

x= a + b + 120 + 168

x= (a + b) + 288

x= 90 + 288 ( cause we know that a + b = 90)

x = 378

false

step-by-step explanation: