2.8 + 4x = 15.6

2.8 + 4x = 15.6


2.8+4x=15.6
4x=15.6-2.8
4x=12.8
x=12.8÷4
x=3.2
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2.8 + 4x = 15.3


2.8+4x=15.3
4x=12.5
x=12.5/4
x=3.125



4X + 1.4 = 15


4X+1.4=15
transposition
4X=15-1.4
4X=13.6
Divide both sides of the equation by 4 to get
X=3.4



Solution equation: 5 * (4x + 7) = 75


5*(4x+7)=75
20x+5x7=75
20x=75-35
20x=40
x=2