book Maths Puzzle Numerical Ability

solve the equation 5c = 2c + 4.5 what is c??

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An architect is disigning a small A-frame cottage for a resort area. A cross-section of the cottage is an isosceles triangle with an area of 98 square feet. The front wall of the c I am having trouble with this one can someone help Thank you so much!

6x � 0.37 = 5(x � 0.28)