book Maths Puzzle Numerical Ability

3x-2(x+6)=4x-(x-10)

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book Other Question

Can you help me solve these three problems? Solve the linear equation by using the substitution method... 2x-y=2 and 4x+5y=5/3
Problem 2: Solve the linear equation using the addi how do you increase the fraction 1 1/2